My boyfriend ditched me on my birthday to get high with his friends!

My boyfriend gets high all the time with the knowledge of my hating it more than anything! He ditched me the day before, of, and after my birthday to get high with his friends. Then decided to tell me the day after my birthday that he was leaving the next day for Toronto to go get high for 4 days all day everyday with 2 of his friends that don't like me. I couldn't and still can't stop crying while he's there. What if he cheats on me? Or does something worse? Or gets arrested?
My boyfriend ditched me on my birthday to get high with his friends!
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