I Have never understood it. What is so wrong with being with the person that you truly love for the rest of your life? You could have the perfect girl, but you wont commit to her. Why?
Well first of all, men aren't the only ones these days who don't won't to commit. It's a common thing among women to date around also. There are so many reasons. People don't want to get hurt, people are to young and just not ready, relationships don't appeal to them, they're selfish and ****.... the list goes on. However I do believe if the guy is really feeling you enough, he will commit. If he's not, he'll give you a million reasons why he can't or won't.
