What should I do?

Erin • Ummm lets see my names Erin I am myself no matter who`s around i love music I love being with people Im a little shy but its whatever (:
My boyfriend is going to his friends and hes getting fucked up more likely well his friemds sister is really pretty and yea im getting jealous about it... anyway I want to go to my friends and get drunk well he doesn't like them and completly blew up on me then we almost broke up what do I do?

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