What do I do? I love my boyfriend?

I have this one ex boyfriend that I can’t get out of my head. Him and I dated for a year but we ultimately broke up because he did not want to be in a relationship anymore or so he claimed. Prior to us being together he had always tried to “claim” me. During our time together he never once did anything that would make me want to end things with him.
Fast forward a year since I have talked to my ex and I am currently in a new relationship. This guy is great, he treats me well, emotionally mature, I point blank love him. I took time to emotionally heal from my ex but sometimes I am reminded of him and I break down crying. I also would like to add that my current boyfriend and I go to the same club I would go to with my ex. And I see my ex there often. He’s seen me with my boyfriend and has visibly shown signs of jealousy, i. e long staring, getting visibly upset, etc. I haven’t spoken to him since we ended things but I always catch him on my social media pages liking or viewing my stories. I know I should not care, but my ex and I were convinced that we were soulmates, (I know this sounds cliche but it was a type of love that I honestly can’t replicate with my current boyfriend). And while I do understand all people are different, hence so are the relationships, I can’t help but feel that I should succumb and reach out to my ex. I hate this feeling I get on occasion.
What do I do? I love my boyfriend?
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