(UPDATE) My (38M) wife (36F) is best friends with her ex-husband (41M). How can I get over feeling like this is wrong when I know he’s just friends to her?

My (38M) wife (36F) and I have been married for 5 years. We have a 2 year old kid and another one on the way. I have a HEA with my wife. Her ex-husband (41M) has been best friends for over 20 years. They were only married for 8 months before she left him and he is (supposedly) gay. I know it’s possible for people to be platonic friends. Even men and women. <br><br>The thing is though that while I know he’s just friends to her, he is in *love* with her. I don’t know if it’s unrequited or if it’s platonic but when I look into his eyes when he’s looking at my wife I can tell something’s there that doesn’t seem right. I admit I’m jealous and it makes me feel horrible. He is a really nice guy and has never done anything to make me uncomfortable. It’s just that I can’t help but feel he is pining for my wife. <br><br>I know I’m not rational because she *is* married to me. I just feel like there’s something between them. I want to break it off but I don’t want to be an insecure husband either. I am rational (I think) to know that she is married to me now and none of this is her fault. I feel bad for him but at the same time I have a problem with this. What should I do?<br><br>EDIT - I don’t understand why this post is blowing up so much but thank you for the support and advice. I am *not* blaming her and I can’t believe people are saying I am blaming her. (There are a few good ones if you sift through the mess). I didn’t know where to turn for advice because I know I *shouldn’t* feel this way. Obviously I am not here to control her but I can control how this makes me feel. I really do appreciate your help. I have some work to do. Thank you very much. I wish I could respond to some of you. I really appreciate your kindness. I really do want to help myself. I will definitely put these suggestions in action.