Hey guys. I've been seeing this girl who I've known for a few years, and the relationship was doing all right, but yesterday while I was working on a project at a library she told me that I was going to be disappointed but she was smoking weed with her cousin and a few other girls. I told her before that if she got into stupid shit I would cut her out, and I don't want to date a girl who does drugs. So how do I go about cutting her out? Should I just stop talking to her? Tell her and make it clear as to why it's over?