I think my ex placed a spell on me

This may be totally overthinking but the more I think about it the more weirder I feel. Me and my ex stopped talking almost 3 years ago but I’m still thinking about him (even though I truly don’t like him). I have no proof that he has placed a spell on me but there are certain things that make me think like that. I have known him since 1st grade we were childhood friends and started “dating” in middle school/high school. He has liked me since kindergarten (so he’s told me) and has always been very weird in an obsessive way towards me. For a example in 2nd grade I had extremely long hair, he asked for a strand of it I’m not sure why but my kid mind didn’t think to much of it so I gave it to him he then ate it. When me and him started “dating” I thought it was fully my idea but turns out my brother and him had conducted a plan to convince me to date him making it think it was fully my idea. When we where dating he had also made a joke about me never being able to leave him because he had placed a spell on me I laughed it off because that’s a extremely insane thing to admit to your girlfriend at the time so I didnt take him serious. Since we have broken up I never see him anymore other then the few times in our neighborhood (he moved up the street from me) and when I see him I feel nothing but annoyance. However I keep on having dreams about him and find myself thinking about him without realizing even though I want nothing to do with him I’ll always think about “missing him” maybe I’m reaching and just highly confused about my emotions. But if anyone has any advice I’ll gladly take it or want to hear about the other weird stuff he has done.