worst week of my life

Started off fine no problems then my boyfriend goes to his cousins house and he wasn't talking to me that much which made me think somthing wasn't right I confronted him and he said nothing was going on so within the next 1 or 2 days my birthday shows up and he don't talk to me all morning making me think somthing going on even more now then out of nowhere I get a text saying he is leaving me. On my birthday. Next day or so found out I was right about thinkin somthing wasn't right he cheated on me and left me for the one girl in this whole world everyone knows I can't stand. On top of that I have depression so this shit is killing me And he also told me she has his heart now.