My husband and I have been married for less than a year, together for four. In the beginning of our relationships, we had some issues, but with boundary communication he stopped. Either way, I had to rebuild trust with him, and I was able to do that. He and his childhood friend have known each other 20+ years. Her twin brother is his best friend. Their whole lives, they swapped on who had feelings for who at the time. By the time my husband graduated, he told her he could never see himself dating her (they have a 7+ inch height difference, nothing wrong with it just not his or her preference they'd agreed apparently). Anyways, my husband crossed a boundary of hers somehow and they hadn't seen each other in 7 years. Also, she had feelings for him when he dated his ex, and constantly disrespected her. Now, we are married, many years later. She started to come back around and hang out with our friend group. One night, my husband went to have a few drinks with an out of town friend he hadn't seen in months. Our roommate later called him asking him if he could pick him up. My husband agreed, what he didn't know was that this girl was with them. A month before this, I had told him that I could tell the girl still had feelings for him ( I study psychology IDK if that influences this gut feeling and observance but anyways), and he promised i had nothing to worry about. He didn't tell me this girl was there that night out of fear of me being anxious and pissed off. Back to this night, they all ended up back where my roommate and this girl were originally hanging out. When my husband went to leave, the girl followed him to grab her phone from his truck supposedly. When he went to turn around, he apparently stopped and just kissed her quick. She told me he also said he loved her. But not even my roommate can confirm this and apparently right after it happened, she only said "we kissed" and not" he kissed me and said this" or whatever. He didn't tell me for three weeks. A mutual friend told me. He said the guilt has been eating him alive since it happened, but that he knew if he told me he would leave. He admitted to being a coward about it. We are going to therapy, and our therapist says she has hope due to how remorseful and guilty he is acting overall. He's been more helpful around the house, constantly smothering me, etc. I just don't know if I can look at him the same. I keep scouring every website searching for answers. It's been a month and a half since I found out, and I still don't know what to do.