How do I know when to let go of a guy?

I met a guy years ago and we were only friends until about a year ago. We started kissing and hugging with the intention of hooking up.

I caught feelings and told him but he told me that he doesn’t want a relationship because him and his girlfriend broke up recently. But it hurts to just be friends. Should I move on or stay?

Also, take into account I am 23 and I have never been in a relationship or even a date with a guy. I’m not familiar with these types of things.

How do I know when to let go of a guy?
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