sure he can be sweet at times. he probably wouldn't have left such a train of descruction behind him if he wasn't... sure he has been an awesome outlet NOW but my concern is that his history shows it to be unlikely that he will be there for you when he meets someone else who is new and exciting to him.

you can of course feel something for him without being a slave to those feelings.

is this a kind of pattern that happens with your relationships? you find someone who is unsuitable, basically, but very very charming, so you get involved despite your 'better knowledge' and then things don't work out? and then... depression?