Idk what to do!!

So my husband has a daughter with his ex and he got invited to his daughters party.. i went along with him ofc..

But it was like i wasnt even there... it was all his Ex’s family who was there and i was sitting Lonely the whole time and he was standing by me talking to the guys. Nd then he didnt even sit to talk to me. And then His ex sister in law , which she is married and has kids. she came all pretty drunk and dragged my husband out to dance it looked like he didn’t want to go but he still went . He was dancing with her while i was there sitting alone looking dumb. How would yall feel in my situation..your husband dancing with his ex sister in law and u by yourself .. i

Didn’t know what to do or how to react.. and after he danced with her , he didn’t ask me to dance not one song. And he has always asked me to dance at parties he would even get upset if i wouldnt dance... and this time

No? Huh. He didnt even really present me to the people he would talk to.

Like why did he even want me to go then if i was like a stranger.. i feel really hurt idk how to feel any advice plss..