i'm really confused about my sexuality?

[LoVe You]

I know it's normal to be confused about this at the age of 17, but i feel like i might even have a psychological problem too. first i want to say that I've been attracted to boys since freshman year, and I'm a senior now. i fell in love with a guy this past year, but he didn't feel the same so i spent the next 8 months feeling emotionally broken trying to let him go. when i finally did, i felt no desire or attraction towards guys anymore. it was strange because i used to always have butterflies thinking about having a boyfriend, etc. I started feeling romantically attracted to girls and even imagined myself as the guy role, holding her and buying her flowers, which is what i used to desire in a boyfriend. from then on my mind started obsessing that maybe i was a man inside, and then i worried that i was transsexual and should get a sex change. I started crying everyday for a month because my mind kept telling me that it's what i wanted, even though i knew i loved my body and always had! i never talked to anyone about this either. I felt like i had some mental disorder because i completely lost myself in those thoughts. i looked it up and read about HOCP, and i had all the symptoms except for it was about transsexuality not homosexuality. is this possible? I decided to stop stressing about it and i felt like myself again, the me i've always known and loved. but then the thoughts would come back and i couldn't shake them. I don't know what's wrong with me i've never felt like i should be a boy, never, i've always loved myself, so why can't i stop thinking about this? it just came back today even though it went away for awhile. i really need help, thanks!
meanwhile, i have a crush on this guy at school who i think likes me too, but i'm too afraid to show him yet because i dont wanna hurt him. i'm too unsure about myself right now