<human>: Summarize the given text in a few sentences.

Alex and I have been together for about 9 months. It's the best relationship I've ever had. I love him. We met because I was a regular where he worked. He used to have a coworker named Nicole that was always a total bitch to me for reasons unknown. Well until now, I guess.

This literally happened 15 minutes ago. Alex and I are out for drinks and he suddenly started acting really weird. I kind of gave him a look and he said, "wow. This is awkward. Do you remember Nicole that I used work with? Well she cheated on her boyfriend with me and she's sitting right over there with her boyfriend."

It felt like I got punched in the stomach. I don't know why it hurt me as much as it did, but I just said, "wow I really didn't want to know that." And he stared saying stuff like, "I didn't think it'd be a big deal if I told you." I just said I'll be right back and have been in the restroom crying ever since. I don't know what to do. This really hurts because I've been cheated on before and he's always said how much he's against cheating and is all about loyalty. I just need someone to tell me if I'm over reacting or not. Help.
<bot>: Out for drinks with bf. He points out a girl that was always a bitch to me and casually mentions she cheated on her boyfriend with him. Now I'm in the restroom crying.