Don’t want to go

My boyfriend is insisting on going with him to this game night with his coworkers tonight. He said last night he wasn’t going to go because he works, and now he up and texts me while I’m at work saying we should go tonight, and that his coworkers really want to meet me.

Problem 1: A coworker is going to be there I DO NOT LIKE. She’s very flirty towards him and she has her own boyfriend. This problem has been going for 3 months, and I absolutely DO NOT want to be in the same room as her. Bf is aware of my problem with her, and we’ve talked about it numerous of times.

Problem 2: He literally begged me, and I’m finding it very unsettling and suspicious.