To break up with your long-distance boyfriend and still be on good terms with the guy is hard, but you need to be honest tell him exactly how you're feeling. Say what you have to quickly, and tell him it's not working out how you want it too. Tell him it's not satisfying you, and that it is not the type of relationship that you wanted or would be capable of continuing. Let him know that having a piece of him from a long distance is not cutting it and you just can't do it anymore. Don't lead him on by continuing to talk, and remember to blame it on the distance, not him.