Am i a bad person if i fingered my friend while she was sleeping ?

You are technically a rapist

It's a bad thing to do but it's good you feel bad about it, so all you can do is not do anything like that again.

That is rape. You could go to prison for a long time. Also if she didn't wake up during, you need to work on your fingering technique.

This is not normal, of course. What you did was incredibly wrong and very predatory. But I DO give you the benefit of the doubt, as you felt guilty about it, which is good, because you have the sense, internally, to know this was a very wrong act. If she'd woken up, or caught you, you'd have a sexual assault/rape case. I do believe you should be 'reported', like above stated. Only because some form of fear/repercussion may be the only thing that can stop you from doing this again. I feel bad for you (and the victim) at the same time.
I completely understand sexual desire and it's intense power over the mind (especially men's minds) I, as a VERY sexual female, have been in those intense moments, feeling 'too turned on', to the point of making a mistake; having sex, with someone I really didn't want to and while sort of dating someone (it wasn't serious, or official. But still wrong of me and I felt guilty and as if it were cheating) even though I told him what I'd done, he didn't end things--I had to, knowing I wasn't ready to commit. Back to your situation, like I said, sexual desire/urges are natural and yes, will often take you to a mental place you feel 'isn't you'.. Because obviously the innate urge comes and takes over (and takes the wheel, so to speak)
You're not a 'bad' person, but what you did was a bad act. It's good you regret it, but that's the only 'good' thing, here; it's very telling of your potential predatory character that you LEAPED into the situation to take advantage of someone/technically RAPE them, the first chance you had and saw an opportunity. You have no right to lurk into someone's room while they sleep and masturbate/rape them. To the moron above, claiming she was "awake", don't be so moronic, vapid and disgusting. I personally know a friend who sleeps so deep, my friends and I have played the most moronic 'pranks' just to see if she'd wake up. Louds sound/physically prying, innocent though. As well as my best friend used to jokingly try and go down on/try to have intercourse with his gf to 'wake her ass up; morning wood' and she'd sleep right through it. Difference is SHE KNEW about this, not just afterwards, he'd force her to wake up to realize what he wanted.. it was funny to him/her/everyone the story is told to.
To be violated in your sleep by someone you obviously do not have any relationship/even a friendship with, stranger, relative, etc
That's rape, even if one were awake and felt scared to speak up, it's unwanted. The exciting thrill you want to believe that was there is your own perversion. Slight hints one is awake/could wake, would indicate 'yes', or even show interest. But being that they didn't have even a great/close friendship, obviously she wouldn't even go out of her way and date--at the least--with this person. With such easy accessibility? and being her brother's friend? All girls know that's the easiest attempt-a-date, if desired. Still. So very beyond the point..

OP: If a man crept into your room, while you slept, and fingered your ass while you slept, you'd maybe 'not know', in deep sleep, but ignorance isn't always bliss. If someone molests anyone while the victim is sleeping, that guilt/shame is on the shoulder of the offender and it may become a bad desire/habit you can develop and act on MORE -- and turn you into a very 'bad' person and you'll not like the karma of prison and men raping YOU/making you THEIR form of release, with no regard of your feelings, body, safety etc
I am not chastising you, still, regardless of the gravity of this act, because I feel your guilt may have been real, meaning you have your senses--somewhat--and can grasp what you did/have the potential to stop. Find a way to qualm over committing an act of rape. Which you did. Do something conducive, if not apologize (which is unlikely) try to control yourself NOW and always.
Really take in the fact that prison isn't a joke and mistakes, there's no undo button.. You've done something you should be jailed for.. and maybe even consider something as ridiculous (seeming) as you'll have a daughter one day.. Think of how you would react if someone does this the future 'her'.. I know a lot of men who constantly explain they are so overprotective of their daughters, because "I know what I did/was like at that age" and seriously suffer with pint up regrets, still, because mentally it's all caught up to them and they fear their daughter will endure something or someone, like they once were/have happen to their daughter what THEY did. It's a bad cycle. But deep down, you know what you did and always will. Punishment, if not caught, can get you still. Your mind can be the worst prison, often times.
There's repercussion to your action(s).. Now, if you don't squash the desire or genuinely regret taking advantage of people, you'll become a bad person. Bad things follow suit with bad people.

Don't.

Meh you're not a bad person you're just a male. In my opinion this is exactly why gals are best suited not to trust guys as guys generally are sexual predators/rapists in waiting that are quick and eager to manipulate any situation. You are a prime supporter of my advice to gals that sleeping or getting drunk around guys a big no unless a gal enjoys being sexually assaulted/raped.

I highly doubt that despite how "sorry" you claim to be that you admitted to her what you had done or sought legal criminal punishment for the sexual assault you committed on your so called friend.

Its normal, i dont blame you either.i would do that anytime!lol
Anyway you are not a bad person.

I think you're not a bad person at all. My guess is that your friend was well aware of what you were doing (it's hard to sleep through such a thing) but she pretended to sleep so you wouldn't be scared. And there's only one reason why girls do that: because they like it too!

Having done something bad is not the same as being a bad person.

If you feel about masturbating to the thought of what happened, then it's probably a good idea to not do that.

Have you seen her since then?