Confused

I’m confused. My ex and I are in the same class, and when I saw her I felt extremely uncomfortable and sad. I tried as much as possible to just ignore her, until we had to work together in class. The conversation started off cold, with comments about each other and both of us trying to ignore one another, but in the end the jokes started, our inside jokes came back, and everything felt lighter and more pleasant. I even walked her home because she lives near me.

Honestly, I’m so emotionally confused, but mentally I know the best thing is to stay on separate paths and not go back, no matter what my heart says. My mind wins — but there’s still that pain of wanting to go back to how things were before, even though I’ve grown a lot as a person thanks to the breakup. She was my first relationship, and so far I haven’t felt the same with anyone else. We broke up 2–3 months ago, so I feel like it’s too soon to make conclusions and say I’ll never feel that way again. But with the little experience I have — she’s the only one I’ve had — and it’s really hard to let go.

(Sorry if the text is confusing, i used AI to translate it because im not that good at english)