How to get on good talking terms with a guy that I stopped talking to unintentionally and now have this weird tension aware of eachother thing with?

So I liked this guy and went up to him a lot but then my friend told me I was annoying him so I stopped and he tried to be friendly I think like once or twice but I was confused whether he was being nice and even talking to me in the first place. from his perspective I look like I ignored him. We make eyecontact a lot and have weird avoidy non-avoidly interactions where we both purposely ignore eachother. He's goes from being super outgoing to incredibly quiet and reserved whenever we’re in a room together. I can’t go up and ask what happened to us or apologize because we were never on terms like that and technically neither of us has anything to apologize for without just sounding weird. He’s cute, I like him, how do I fix this?
(This has been going on for like a month by the way so it’s not like new it’s extending long enough to be awkward)

How to get on good talking terms with a guy that I stopped talking to unintentionally and now have this weird tension aware of eachother thing with?
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