Am I or aren't I? I'm actually quite scared.

This has been bugging me for the best part of a year now. I think I'm bisexual. And I'm scared.

I'm not entirely sure why I'm scared, I have nothing against people who are gay/lesbian/bisexual, but I just am.

I've never told anyone about this, again I don't know why - it's not like my friends are going to desert me - but I just feel I can't tell them. I guess it's almost like they won't believe me. (In a blog I made a week or so ago, I said that I felt people thought I'd be trespassing into their 'territory' if I looked/behaved like them, so I guess that's why I'm worried about not being believed).
I daren't tell my family either - my dad sorta has a problem with homosexuals.

I'm trying to ignore it but it weighs quite a lot on my thoughts; and I'm trying to accept it but I'm resistant to it for some reason and it really annoys me because I don't want to be.

That's all I have to say really, I just wanted to get it off my chest. If any of you have any advice I'd be grateful, I guess I kinda need some reassurance right now..