AITA for dating a girl while I have a crush?

The Accusation

I know I'm probably the asshole for this but i still wanted to ask. I (17, male) was dating a girl in my class (17, female) a few months ago, it had been going well for about 4-5 months but we broke up badly, we had a fight over text, she blocked me for about a week, then re-texted me saying she was sorry but I said no and said the damage was done, 3 weeks later, she texts me again and sends me something I sent into the class gc and asks a question about it, I obviously answer because it isn't anything personal, then she tells me something about a classmate getting a boyfriend, i say okay but say that i told her to NOT text me ever again and that she didnt listen, we talk for about 30 minutes then we have a really bad fight and it ends, i think nothing of it for a while but after 3-4 weeks i start feelings for her again, i say to myself that it's nothing and that we broke up and that was my choice, but my feelings develop and i have a crush on her, fast-forward a few weeks and a new girl in our class asks me out and i say yes while still having a crush on my ex, i dont know what to do, our relationship is going good but i still have a crush on my ex. What do i do? (Sorry for bad punctuation, english is not my 1st language)

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