Because of the way our social circles work here, this tends to happen.

Tonight we've got a massive group going to do some karaoke, which includes both my Ex and this new girl I just had a date with. 

I know for a fact that my ex is super pissed about the fact that I'm interested in a girl, and she doesn't even know I had a date with her yet. She just knows we were flirting a bit, and she yelled at my best friend for not telling me to stop, apparently. Somebody in my circle has no tact, dunno who. She is somewhat unstable right now I think.

I'm not going to get pushed out of going to things just because she's going too.

How do I manage this? I'm wondering if I should give the new girl a heads up, because while I don't THINK my ex is crazy enough to pull anything, who knows. But then I don't want to scare her away just because I'm being paranoid. I also don't want her to think I'm disinterested if I try to not give her attention when my ex is around.

Messy situations!
user
Ex and new girl are going to the same event, ex
assistant
Because of the way our social circles work here, this tends to happen.

Tonight we've got a massive group going to do some karaoke, which includes both my Ex and this new girl I just had a date with. 

I know for a fact that my ex is super pissed about the fact that I'm interested in a girl, and she doesn't even know I had a date with her yet. She just knows we were flirting a bit, and she yelled at my best friend for not telling me to stop, apparently. Somebody in my circle has no tact, dunno who. She is somewhat unstable right now I think.

I'm not going to get pushed out of going to things just because she's going too.

How do I manage this? I'm wondering if I should give the new girl a heads up, because while I don't THINK my ex is crazy enough to pull anything, who knows. But then I don't want to scare her away just because I'm being paranoid. I also don't want her to think I'm disinterested if I try to not give her attention when my ex is around.

Messy situations!
user
i'm seeing a new girl tonight and my ex is mad
assistant