Girls and Guys

You know what I honestly think...I think that when guys and girls get hurt...they try to put up their "walls" so that when the next john or jane comes along they won't get hurt. They think that they'll get hurt again and so they act like assholes or bitches as a way to protect themselves...whether the guy or girl was really good or not. I hope this makes sense. But in my case...my ex claimed to have all these bad relationships...so I made a tremendous efforts to be the girls he's never had...done everything for him...but yet he still did me dirty...
Now why is that?!?! I think that since he's had shitty relationship...he may have not been able to know how to act or communicate what he really feels...I hope that makes sense...