Boyfriend problems

So me and my boyfriend have been on and off .. and the last time we brokeup.. about 2-3 weeks later , we weren't speaking at all.. and I was at a party and I kissed some kid. That was it.. didn't think about it after that until me and my boyfriend decided to work things out we weren't together or whatever .. but we were doing really good and workin stuff out he asked if I saw anyone while we were broken up and I told him Abot the kiss and he wasntthat happy ... little did I know he went to a club with his friends and let girls dance on him and brought one home and didn't tell me .. his friend slipped and said it . His excuse was "we weren't together" .. but we were working things out .... yet he got PISSED when I told him about the kid I kissed ... and we weren't even SPEAKING.. what do I even do..