I think he's saying that he just wants a low maintenence relationship, not a girl who he can share his world with. Pretty much he wants a girl just for convenient sex, without any attatachments. he talks about his failed attempts at this, and how eventually he does find a girl who seems to be just like him, but in the end she just leaves. However, he doesn't really get hurt by this because he's never in love enough to feel it
I think he's saying that he just wants a low maintenence relationship, not a girl who he can share his world with. Pretty much he wants a girl just for convenient sex, without any attatachments. he talks about his failed attempts at this, and how eventually he does find a girl who seems to be just like him, but in the end she just leaves. However, he doesn't really get hurt by this because he's never in love enough to feel it