Personally I think in this situation being able to communicate is great. I think losing someone that great over the kiss is sad. If you communicate with him and tell him you like it when he kisses you a certain way, if he's too rough, say you like it when he kisses you softly, or gently. If he's sloppy, or something else then you need to say to him without making a big deal out of it, maybe suggest trying a new kind of kiss so it doesn't make it so obvious that he's doing something you don't like. Just talk to him, kiss him the way you want him to kiss you and he may follow, try things, don't throw it all away over a bad kiss.