Hey everyone. My partner started dating someone very recently and they moved very quickly to sex. I knew it was a possibility, but I didn't expect it would happen after the second date. We've had a lot of talks this week. Many emotional ones and I've been talking to a poly friend plus doing my own work challenging it. I'm hurt and I know it's my own stuff. I didn't do things with others, because he was uncomfortable in the past but he eventually said it was ok. I know that was my choice as well. I was really angry with him twice this week which isn't an emotion I'm used to experiencing, especially with him. I sat down and realized my anger was covering up my hurt. He sat down with me last night and let me cry it out then we had a good talk. I was reading in More Than Two about going through the dark night and I think I've had a few recently. This was a big change for us and I was taken by surprise by the speed of it although it was within our boundaries so he did absolutely nothing wrong. I feel confused by my emotional reactions. Has anyone experienced anything like this before when your SO had sex with someone else the first time or the first new relationship? Any advice or suggestions to help me through rough times like this. I'm so frustrated with myself for getting angry and even taking it out on him twice(which I apologized profusely for and I'm still shocked by my reaction).