Why a guy wouldn't call after fourth date?

he is obviously interested in you,maybe,he"s had a bad past relationship and is taking things a bit slower now.if he doesn"t call back by say,2 weeks,move on. you don"t deserve the little fish,you have been patient enough. you go on out there and get the big shark girl. you deserve it. good luck and i hope you find happiness. bye from erika.