Some context: I’ve been dating my partner for about 7 months now.

I’m coming out of a marriage and wanted to explore polyamory and open relationships to see if they’re actually for me or not.

We slept together at a work event after being friends for about 6 months. I knew he had a handful of partners. I had 0. He was the first person I slept with in 10 months. But I was okay with him having other partners. It wasn’t an issue.

After we slept together, I thought we would just be FWB and see each other each when we see each other. Told him we don’t have to talk everyday. Have a good life. See ya when I see ya. He started reaching out more frequently and that turned into us talking everyday which was fine. I liked him and it felt natural so I went with it.

About a month after we slept together, he tells me he wants to be in a relationship with me and prioritize me. Plans a trip to come see me. We discussed him having relationships with other women but being in a relationship with me and the difference between us and those relationships.

So at this point we’re open. He still talks to and sees some partners but I come to find out that he met someone new at a work event the same weekend he told me he wants to be in a relationship with me.

I found this out a month and a half later and I find out the day before he goes to fly out to see her.

I was upset that over the month and half that this happened he never mentioned it to me. I wasn’t upset it happened. I was upset he never told me.

He goes on his trip to see her. All I know is they met at this work event which was the same weekend he says he wants to prioritize me but it doesn’t sit right with me. He can tell something’s off and asks me if im upset so I tell him that when he returns back home I’d like to talk to him cause I’m upset. I don’t want to shit on or ruin his trip so I keep my distance while he visits her as to respect their time.

When I tell him I’d like to talk to him when he’s home, he tells me he’s booking a flight to see me the next day to discuss this.

I’m like okay!! Wow. Great. He comes the next day and I find out they didn’t just meet but they had sex when they first met. They had sex the same weekend he’s telling me I’m a priority and he wants to be in a relationship with me and I’m JUST finding out.

It’s been 7 months and I cannot let this shit go. It still makes me just as mad as it did when I found out the first time.

Since then he’s decided that he doesn’t want to see other people.

Like is this the nature of nonmonogamy and it’s just not for me? How do I move on? Forgive? Forget?