breakups suck.. but it sounds like you guys are making yours as civil as possible.. I honestly think you made great decision.. because honestly.. like you said.. interestingly enough the same problem came back up a few months later. I honestly believe, from alot of experience, that most problems like that don't get solved or go away.. things may get better and lovely for awhile.. but they almost always come back no fail.
you are still so young and its better to break the cycle now, if its not meant to be.
oh and as for the kisses and makeout sessions.. my dad and mom (married 25 years) still make out and my dad grabs her butt and thinks she's the hottest thing in the world. Because of them, I won' t settle for anything less, and I don't think that that is a bad thing!