Confused feelings

Going through a large rough patch with my husband. I have tried and tried to fix things. We have finally got to a point where I think we can move on and fix things. But for over a year now I have this guy stuck in my head. We don't ever talk or hang out or anything. I may sound crazy I just feel like this instant connection. But I want to work on my marriage and stay with him the other person just won't get out of my head. This other guy has a girlfriend as well. I may be crazy lol