If there is no Chemistry, why would you bother yourself for a guy with problems?
I'm like you, I was always thinking probably I make a mistake and I have to give the guy another chance....but if I don't have that Chemistry, no matter how many dates I go out, I'm still the same....
don't waste your time and energy for him.....plus, he has lots to deal with....why bother?
I'm sure one day you will find that decent guy whom you have Chemistry with....
take care
Marjan