I didn't know you had split/broken up.
stand sb up
You stood me up last time.
blow up at sb
I'm sorry I blew up at you yesterday.
a good catch
Mary's boyfriend is a good catch.
A: How is everything going with your girlfriend?
B: Didn't I tell you? It's over.
A: Oh, I'm sorry to hear that. I didn't know you had split up. What happened?
B: It was a few things. The first thing happened was that we were supposed to go out for a romantic dinner for our one year anniversary, but she stood me up.
A: Really? Did she tell you why she didn't show up?
B: No. but I ended up finding out later that night when I saw her with another man at a club near my home.
A: What was she thinking? Did you confront her about it when you saw her?
B: I wanted to, but I knew if I spoke to her, I'd just blow up at her. So I decided to just go home. I called her later that night, but she didn't answer the phone.
A: I can't believe she would do that to you. It's so dishonest and rude.
B: I know. And I still haven't heard from her.
A: I bet you she regrets what she's done. You're such a good catch. She really lost out, didn't she?
B: I guess so.
A: It's always nice to have some closure. But I don't think you'll have a problem finding another girlfriend. There are plenty of fish in the sea.