My ex is always overlapping his relationships. When we started dating, I wasn't aware, but he was still with his previous girlfriend. Then to my surprise, when we broke up, he had actually been talking to another girl before we even broke up. A three year relationship and he had no time at all between our relationship and his new one...i just don't get it why does he do this? Do other guys do this. He gives his self no time to grieve over a relationship or even acknowledge that the other relationship is over, no matter how serious it was (which ours was pretty serious)! It hurts so bad that he could be so inconsiderate.