I agree with Shez. Do not completely give up on the guy but let him know you won't drop everything at the last minute. A guy did that to me once. Invited me out on New Year's Eve at 2:30 in the afternoon that day. I did give him another chance and we have been married now for 25 years.

Don't give up. You will meet the right perdon. Maybe not perfect, but right for you.