i do this too, a lot. quite often with friends actually.
the last girl i was with i'd finally started to get over it when she left me for someone else. nice one. talk about two steps forward and four steps back
so i'm staying away from relationships for a while. i'm obsessed with being in love, when i'm there i'm the happiest person in the world. but it consumes too much of me and i just don't think i can function properly. i need to work out how to be myself before i can be someone's other limb.