I am 19 years old and shouldn't be worried about sexual problems yet but I have no feeling on the inside of my vagina, only on my cl*torus so I can't orgasim when I'm having sex with my lover and it depresses me and drives me crazy because my sex drive is very strong yet I can't come with sex, only masterbation. Is there some kind of medicine to make the nerves inside my vigina more sensitive?? Can anyone recomend something??

it's cuz your stayin still love.
You have to learn to wiggle a bit...let your clit rub against the meaty part above his penis...has nothing to do with his size. He just doesnt know your spots yet. Trust me, I had the same problem, I could only come....well, with different methods. Just have at it some more...you'll find it right.
If not, then I would tell him to massage your clit while you have sex (or you can do it yourself, he may find it quite arrousing)
p.s. you need to learn how to wiggle men dont know anything about pleasing a women untill they are taught