What should I do?

So basically I was going through a hard time with depression and I didn't know who I was or wanted to be. I was bullied which really brought me down. I came out Genderfluid, which I think it meant u felt like male or female any given time whenever. I could be wrong idk, no hate. But basically I dated a girl, then we broke up. A lot has changed, first year of high school, and I am definitely not gender fluid.

What I'm getting at is there was this girl, who I thought I liked, but I don't and my feelings were all wonky bc of stress from exams and everything. Basically she asked me out, and the next day I dumped her because I don't feel that I like women anymore. (Btw I came out bi, forgot to add that, but I'm not anymore)

Is it bad that I changed from bi to straight? I feel guilty for some reason, like people will hate on me, but I was confused, and was figuring out who I am. Should I tell the girl how I feel? I need advice.