I need some desperate help with this, preferably girls for answers but boys can answer as well.?

Not your everyday: HELP ME WITH THIS GIRL or I need advice on dating this girl but something different.

Hi,

I have some really annoying girl problems. Girls keep flirting with me and just trying to get me to ask them out when I am clearly not interested. I have tried some techniques in dropping them but none seem to work. Some of these include: The I don't give a flying **** attitude, simply telling them I am not available or better yet "I am gay". They ignore all and still pursue.

Some of you might be wondering why this is annoying. Well because of 3 major reasons:

1) Can't have a decent relationship with girls, by this I mean friendship and quite literally every girl I used to be friends with always hits on me and tries to ask me out on dates

2) Awkward.. Very awkward because sometimes it makes me look like a misogynist having all these girls around me. (Some teacher actually said something along the lines of me being a misogynist)

3) Can't get school work done nor can I concentrate in class, in my final years of study I find it incredibly hard to concentrate in class if girls keep ogling me.

There is also one more thing. I live with a family that isn't mine and the family happens to be my childhood friend's house (she's a girl). I can't even concentrate when I am at home because she flirts with me and sometimes she makes her way into my bed and I wake up with her in my bed.

So my question is: How do I stop leading girls on? Or How do I get out of this situation?

Thanks.

I am not homosexual.