Well haven't we all been hurt and damaged by previous relationships? Wouldn't it be foolish not to adjust your behavior based on the outcome of the previous relationship? We all make mistakes...live and learn.

It all depends if the person allows those hurt feelings to influence a new romance in a negative way. If negativity seeps into the new relationship I would have to advise the person to work out what needs to be worked out and if he decides he still wants to date me ... well, gimme a call and we'll see where it goes.