my fiance smokes

I have a problem, my bf smokes weed n honestly i hate it i hate the smell n just everything of it he tells me its nothing because he does it on like 2 a week but it still bothers me. He has gotten bad friends that are a bad influence n he never listens to me when i tell him not to do something. Im tired of it n honestly its a long long story as to why I dislike his friends but he doesn't care. Is it bad I feel this way!