Not sure how to tag this post. I'll keep it simple.
Right now I'm male, 30 and in a loving relationship near 7 years. All 10/10 on that front.
But lately I've been thinking about an ex ("Jane"), and the possibility that a very close friend of mine ("Mike") may have at the very least tried to hook up with her. This was like a decade ago. Suddenly I can't get it out of my head and I'm depressed and angry about it. I dated Jane in college for 2 years, where we were steady boyfriend & girlfriend until she decided she needed "time off". Felt like I was getting demoted and that suddenly I wasn't as important as she was to me. It was awful. She'd go off the radar for weeks with "friends" only to show up and pretend no time had passed. Tried it, hated it, broke up some months later.
Maybe a week or so after I break it up and cut every tie, my friend Mike gives me a call in the evening. He's frantic and asks if I've spoken to Jane. I hadn't. He tells me he's coming over. We meet and he's in a state I hadn't seen him in before or since. Anxious, panicky, "dude this is serious" level of seriousness. Again he asks me if Jane had said anything to me (she hadn't). He relaxes a bit. We go have dinner. He explains that Jane had threatened to tell me Mike had tried to hook up with her. I reacted by choosing to believe Mike. Jane was an unstable person, especially in our final year together. She was loud, easy to anger, feisty (at her worst she threw things at me) and, I knew this too well, always making empty threats. Child of a physically abusive family and prone to substance abuse, too.
It's not that I didn't have reason to believe Mike didn't have a thing for her. Me and Jane used to double date with Mike and his girlfriend. We were part of the same little group for so long, and Mike is this hopeless romantic who gets a crush on any girl who hangs in his vicinity for a while. Thing is by the time I broke up with Jane I hated her guts, wanted nothing more to do with her, saw this supposed threat as a final stab at making me miserable. But she never contacted me about it. All I ever got out of the situation was that Mike was panicked and ready to go out of his way to get to me before she did.
8 years later I'm obsessed with this past scenario for no real relevant reason. Mike is one of my closest friends and, outside my girlfriend, the only person I can spend on a videocall for over 2 hours in the middle of quarantine. I love the guy. But the uncertainty gets me. If I were to question him he wouldn't trust me anymore, and if he were to admit it I wouldn't trust him anymore either. I wish there was a way of confirming if he did try to get it on with my ex but all I have was his version of a thing my ex never brought up (nor did I ask: I've never contact her since). I moved on all these years and suddenly I can't stop thinking about it. I hate being lied to and the possibility that my friend has been sitting on this lie all these years breaks my heart a little bit.
What would you do in this situation?