Is it wrong to make time for someone only when it's convenient for you?

A buddy of mine was recently trying to help me get over a heartache involving a girl that things just didn’t work out with. Like all good friends, he tried to point out why that girl was probably no good for me anyways. One thing he said that struck me as odd was, “She only wanted to make time for you when it was convenient for her.” Last I checked…we’re all like that. If it’s an inconvenience to deal with someone at that time, we tend to push it off until later…or am I wrong? Also…I took that statement at face value….could I perhaps be missing something deeper he was trying to say?