Long story short - me and my ex split 8 years ago. He ended it with me Xmas day as things got complicated and he thought I was cheating (I wasn't) and it turned very bitter. We've spoken on and off for years when we see each other but it's been nothing but casual chat. A few years ago I bumped into him with my family and my boyfriend and he asked me my parents how I was, if I met someone etc but wouldn't directly speak with me.
Fast forward another year I saw him again but we didn't speak. He then added me on social media randomly. I declined the invitations.
Then two years ago we saw each other again and we hugged and kissed cheeks and he walked away immediately didn't say anything. Was quite weird. Then I saw him last year and he was chatting to me about general life and the I knew spark was still there for us both. I still think of him even now, after 8 years apart. See each other perhaps once a year at a social event we both go too. All his friends have also mentioned to me he's still no over what happened.
I'm in a very happy relationship with my boyfriend of 4 years but I just can't stop thinking 'what if'.
I don't need anyone to tell me it's just me not thinking rationally, the feelings been there for a good few years. How do I get rid of these feelings please?