I have been with DP for a year and he has just told me he regularly takes cocaine socially when out with friends. This has been going on the whole time we have been together! He says he isn't addicted and doesn't think it's a big deal but I am upset he has kept it from me for so long 
He says I am overreacting but I am now seriously considering if we have a future together or not. Would it be a dealbreaker for you?