Why'd he do that?

What goes through his head is that he was afraid his girlfriend might catch him .
You need to watch out for two-timers .

He's just a plain idiot. Both men and women do this playing crap and all it really does is ruin it for us honest and loyal people. Get rid of him and find someone else. Some people just have no sense of doing the right thing and give absolutely no excuse for a man who dates other women while having a partner.

I will always call a woman after the first date. Always. I will also approach the woman if for some reason I could not reestablish contact. My own personal problem is that in most cases, the first date is the last one and never see her again. *sob* It usually takes about two weeks of calling for me to realize she is not interested in me anymore.