Dating

Boyfriend went to a random girls house party and did everything he said he wouldn't.. should I be mad?

Hey guys,

So my boyfriend went to this random chicks birthday party, even though he has work the next day, he still decided to go (he never goes out when he has work the next day). I was never invited to the party as i don't know this girl, however I felt like it was kinda slap in the face that he wouldn't even ask if I could join the party too, just so I feel more comfortable about the whole thing.

He said he'd leave the party at 9pm so he can get sleep before work, and said he wouldn't get drunk. After him not leaving the party at 9pm, i start going on instagram and looking at people who are at the party's stories. there's a video of him and a girl in the background of another girls story of him and a random girl leaning on each other/holding each other up. He also got really drunk and leave the party at 1:30 am... Do I have the right to be mad/suspicious?

Thank you
Boyfriend went to a random girls house party and did everything he said he wouldn't.. should I be mad?
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