How do I get over someone that I’ve been In love with since I was a child but cannot be with. (Due to miscommunication) ?

I’m pretty sure we liked each other for a while, maybe even love (I can’t speak for him)? However a lot of shit went down and we started “hating” each other. We talk a little now, he still calls me by my ‘nickname’. It isn't the same though. I’ve tried to move on or at least just forget about it. It works for a while until it doesn’t. So, how do I just… move on?

How do I get over someone that I’ve been In love with since I was a child but cannot be with. (Due to miscommunication) ?
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