Gay off/on-seasons. Why is this happening to me?

So I am a girl and I used to consider myself bisexual at least (although i was pretty into girls just in denial) but all my encounters have been so shitty i'm no longer attracted to girls. I hooked up with my best friend who was too scared to tell me how she felt and then started hating me because I didn't feel the same, I hooked up multiple times with and was talking to this girl who was going to be my roommate for school but then she didn't want to room anymore and shit ended so badly (now she hates me), and i hooked up with another girl who stopped it in between because she had a boyfriend.Honestly my whole life until the stuff with my ex-roommate i've always watched lesbian porn and been really attracted to girls... But now, I get grossed out by the thought of getting with a girl, let alone watching a video of it. I haven't even thought of any girl sexually at all either when that was the first thing i used to do. I can't describe it but i just kind of just stopped being attracted towards them. Does this make sense?I'm super confused. Looking for some advice. If anyone else could help me out and explain all this and tell me what to do with myself pls do! I don't feel attracted but i know girls are so sexy