what are your opinions?

I've liked boys my whole life, no doubt about it. Never even crushed on a girl ever! I mean ever. My mum even told me when I was like two or three we would see our cousins and id go straight to my big cousins who's a guy and he's scary and stuff and id go straight to him because I liked him. Not in an incest way but because he was a boy. Now like I said I've always had guy crushes seriously guy crushes and I've has boyfriends and liked most of them even in kindy I had a crush on this one boy haha. And in year 6 I dated this boy who I was mad about literally up until last year I was crazy about like everytime he'd talk id freak out and stuff. But in the holidays someone asked me on tumblr if I was a lesbian and I started freaking out thinking who thinks I'm a lesbian and stuff. I got depressed about it and now I'm like not wanting to do anything but sleep in bed all day and just cry pretty much. Also since this ocd thing came along everytime I see a new pretty girl id full on freak out about it. Like anxiety, and there's this new girl in class who's lonely very pretty and we are like semi friends but I freak out everytime I'm near her and stuff, like axienty and always thinking what if I like her and what if I want her but deep down I don't and I don't want a girlfriend or relationship with one at all but its always in the back of my mind and freaking me out because now I'm so unsure of my sexuality and everything. I'm 14 and probably going through that bi-curios stage like everyone has said to other girls who are going through this and I get it and stuff but I don't want to act on it. I now have lost absolutely everything for boys but not because of my orientation because of my depression, I've lost every will to do anything and I know I like guys but the one who I was like mad crushing on everythings gone for him now and I don't want to be a lesbian or bi and I guess because I have 3 other sisters and they are always teasing me saying 1 in 4 are lesbians and that it has to be me because they've all got partners and stuff and my other sister who is mean is always like I have a vibe that you're a lesbian which doesn't help out anymore. But also I looked up naked women and naked men and nothing turned me on. But when I saw lesbian porn it did turn me on but only because I can relate to her getting pleasure if you can get me like yeah. But id never want to have sexual intercourse with a women. I've never had crushes on girls either and I don't think I have a crush on the new girl either I think its just anxiety and the fact that I see her quite a bit like makes it worse because I know her if you get me. What are your opinions ? My mum doesn't think I'm gay she just thinks I'm mental because I can't stop my brain from thinking and she's more worried I'll end up crazy but I don't even care. I'm just so worried I'll never like a boy again and that I'm forced to be a lesbian. Sorry for how long it is!