Just remembered one time a guy I was dating (he lived a three hour drive away) told me he would fly me down if I drove to visit. I held my end but the last time I was there I found out he cheated on me. So I made sure he bought that ticket and drove an hour to the airport and waited for me. Well, I was at the beach. He was texting asking me where I was and I just kept running him in circles. I stopped answering his texts and enjoyed the rest of the day. When he finally understood what happened I just replied "it sucks to have your time wasted, doesn't it? "
Never felt bad about that.