So I have had this problem for a long time. Me and my boyfriend have been together for 3 and a half years and he is the love of my life. Before we got together I left an ex boyfriend to be with him after being treated horribly, being cheated on by him and having him tell me he was still in love with someone else. Me and my boyfriend are like partners in crime, and at first that nothing could separate us. Now there is a girl at work that he has built a strong friendship with, much more beautiful than i could ever be, and I can’t stop thinking that he is falling in love with her and he will soon cheat on me with her. We have argued about this often, but our last argument was a severe one, to the extent that he has said he will leave me if I don’t stop accusing him of cheating, as he is hurt that I can’t seem to trust him around her. I don’t want this to ruin our relationship. Honestly he is the best thing to happen to me, so what do I do?