Attraction dilemma, what can I do?

OK so I was very close with this other girl back in 2020 and I became very close with her to a point were I could literally feel if she is not OK, I would literally get sick until I talked to her and actually found out she's not OK, she rejected me, even though we hung out almost everyday, we were happy, she loved being with me, she always said she felt safe and she really trusted me like really trusted me told me her secrets, etc so she said she wasn't ready to be with me and we know that it just means she's not interested in me, so I said goodbye after a year we because it wouldn't be OK for my own health and we never spoke again, 4 years later I'm still thinking about this person, even though I have a girlfriend now my very first girlfriend actually and she is amazing, we both don't drink and smoke, she's just the female version of me, yet somehow I still feel like I have feelings for that other girl, she recently reached out and we talked, but I realised it's not like before I don't get too nervous like before, so I need advise on how I can just completely move on from her, I really love my current girlfriend, I just want to forget about this past one, I just don't understand why I can't move on, and it's really making me feel guilty, I only got a girlfriend in 2021 for the first time in my life, I'm 29 years old now.

Attraction dilemma, what can I do?
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