You do want to give him a second chance without being a complete doormat.
Another theoretical paper suggests that costly signals that are worthless to the recipient work nicely, because the cost signals to the recipient that the donor has resources and values her highly, but by being worthless, it screens out "gold-diggers" that merely want the gift.
Perhaps setting a pile of cash on fire would do the trick?
Is there a science to making better dating decisions?
It's 5.30pm on Friday night, and you have a date for 8pm.
For example a classic ploy is 'Don't ring for three days, because you don't want to come across too keen'.