Alright, here goes.
I'm 19 years old, and still in puberty. All my life I've been attracted solely and exclusively to women, this includes enjoying sex, falling in love, etc. Then, a couple of months ago, I've been struck with an obsessive fear about turning gay, though there was no proof or reason to think so. This threw me into a long period of anxiety and depression which completely killed my sex drive.
Anyway, I've gone through a whole variety of attempts to check whether I was truly gay or not, including watching gay porn, and a couple of times, masturbating to it.
Here's the thing: I hardly get hardly any arousal from homosexual images or thoughts. They are often even unpleasant and undesired, however, when I tried masturbating to them, it felt... a lot better than usual. I don't think I could ever fall in love with a guy, or be with one... What does this all mean? Could I be gay? Bisexual? Combined with the recent lack of sex drive, this is completely destroying me.