For some odd reason, I seem to make enemies almost ANYWHERE I GO!
School: Can't find no-one who even likes the same type of music, hobbies, anything.
Trying to socialize: No-one gives me normal human conversation, just smile, go 'uh-huh', and move on with their friends even if they were completely ignoring them a second ago.
Anywhere else: Same.
The only friend I actually trust I don't even know in real-life.
And now, I start talking to myself or commenting on other people's conversation.
So, is this normal or am I proceeding down the path the school-shooters go?
School: Can't find no-one who even likes the same type of music, hobbies, anything.
Trying to socialize: No-one gives me normal human conversation, just smile, go 'uh-huh', and move on with their friends even if they were completely ignoring them a second ago.
Anywhere else: Same.
The only friend I actually trust I don't even know in real-life.
And now, I start talking to myself or commenting on other people's conversation.
So, is this normal or am I proceeding down the path the school-shooters go?

All sorts of BS comes out of the mouths of hormonal, unstable, developing minds. One minute someone seems like your best friend and then it's like they don't like you at all.
It doesn't excuse the behavior (everyone deserves to be treated with respect), but it's an opportunity for you to learn good social skills by overcoming these limitations. Just bare in mind that it's by mutual negotiation and it's not easy (because they're just as paranoid about being popular/hated as you are). But later in life, as we mellow out, we learn to let the people who stayed in the HS mindset drown in the water cooler while we go over there and not give a toss.
So yeah, you're totally normal :)