A girl hit on me today and I feel so sick

I'm coming up on 2 months since the breakup, sometimes I feel like I'm fine and then a random memory will appear in my head and make my chest heavy.

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Since the breakup I have been working out a lot, I figured I'd follow the typical breakup advice. Today at school some girl from another course said I look good.

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At the time I took it well and acted smooth, but a little bit later I genuinely felt queasy and sick with guilt.

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Just the idea that I could move on with anyone else made me want to faint. My ex doesn't care about me like that but yet I'm letting her get to me even now.

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She was the only girl I ever loved, I loved every moment with her. She was perfect, I never thought someone like that could like a guy like me.

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Any other girl in comparison might as well be a cockroach and I know that that is absolutely stupid to say and completely untrue, but that's just how I feel.

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She was pretty cute too, I really hope one day I'm able to go for it again.