My husband's boyfriend

Six months ago my husband and I moved into a rent house. There is a guy who lives in the house behind us that my husband became instantly infatuated with. I'm not one too judge, I was married to a woman before I married my husband. Love who you want.

The neighbor and my husband started up a bromance... They were just friends at first who flirted a lot. Somewhere along the way they started dating. It never bothered me because I know where my husband and I stand in our relationship. Eventually it became the three of us dating because the neighbor is bisexual as well. We would go on dates and spend weekends together. It was super cute.

We finally crossed the no contact line and had one really crazy night of fun. Shortly after the boyfriend cut off all contact. Now the husband is convinced that the boyfriend was only using him to sleep with me. It makes me feel awful because my husband has/had real feelings for him. I do feel somewhat used, but not enough to make it a big deal. I just worry about the husband.