What’s wrong with me 🤦🏽‍♀️🤦🏽‍♀️

I’m 21 years old now I got with my ex when I was 17 we broke up for good when I was 18

Our relationship was crazy toxic like arguing , fighting , he cheated on me and I cheated once only because he did I’m just confused because this has been years ago and ever since I was 18 I look his Facebook up not everyday but I still do it I’m married now and I love my husband so much I don’t want to be with my ex at all but last night I had a dream about him it felt so real and I can’t stop thinking about my ex please don’t judge me I just need to vent why do I feel these feelings and I can’t explain why I look him up but I always do and he does to he always watch my stories on Facebook and text me I never answer because I’m faithful to my husband if you experience this or delt with this before what can I do to stop I want to stop looking him up on my social media 🤦🏽‍♀️