Im going to keep this fairly short and sweet, I just need to find out what my problem is.

When I meet a girl for the first time, there seems to be initial attraction (I workout and think I look fairly good?). I am confident and I believe I can flirt and hold conversation.

What my problem seems to be is flakiness/lack of contact/effort after the first date. I am unsure as to why many girls flake on me after the first date even when I thought everything went cool?