I stopped finding girls attractive.

That's it. I'm going out of my mind. I've jerked off to girls and straight porn since i was about 11 years old and fantasized about naked women since about the age of 8 or 9. I blew huge nuts jerking off to tits, ass, etc.(I'm 21 years old btw.)For an entire year I've been struggling with the idea that I might be gay (or bi?) and so I've been jerking off to porn compulsively and excessively in order to see if I still find the idea of sex with women attractive.I've literally been beating my dick senseless multiple times a day - jerking off doesn't feel good anymore. GIRLS don't turn me on anymore. I don't even find women attractive anymore and can't get off to them or even quality boners from them anymore.Men have turned me on and are doing so more than ever before now, but I'm not sure if that makes me just strictly gay.I've wondered for a very long time if it's possible that I was extremely repressed homosexually and NEVER found girls attractive, or if it's possible that I DID indeed like girls and just not any more, or if I'm bi and am changing preferences, etc...I used to have very specific fantasies about women and certain womanly fetishes, but nothing does it for me anymore.Is it the excessive masturbation? Am I gay?I was with a pretty sexy woman in bed a few months ago with BEAUTIFUL tits, and I almost couldn't get my dick hard enough to fuck her and it was extremely disappointing.I dated a girl for 2 years and we fucked like 100 times, and now I'm starting to look back in hindsight to see if I actually ever truly enjoyed it.Look, I know some people who can't accept they're gay try to "make themselves straight," but I promise you guys, this isn't my case.If I knew for certain fact that I was gay, I could not pretend to be someone I am not, but I swear I at least used to "THINK" I was sexually aroused by girls and remember having CLEAR and SPECIFIC fantasies about certain girls, and getting boners over boobs and asses, and getting excited about the thought of sex with a pretty girl, or even just hugging a pretty girl, etc. but I feel like that is all gone....Was it ever real, or have i just been gay my whole life and didn't know it?Plz help guys... I think about this so much every day, it has my life at a halt... I've been depressed about being potentially gay, after believing I was straight for my whole life....It's not so much that being possibly gay depresses me, but it's thinking that I lived a lie for years, or that something that was a huge part of my life - (fantasizing about sex with women) - was not true, or something.I have many many details and I could type about this subject for hours, so if you have any specific questions about ANYTHING, please ask them.I appreciate it sincerely guys, thank you.