This might not be a popular answer, but I think it needs to be said. Since you broke up with him, what you should be feeling now is a combination of relief and freedom. Relief because whatever he did is over, and freedom because you are now able to move on with your life and be happy.
The problem seems to be that you are lacking in self esteem, and don't see yourself as the wonderful person that you truly are. What you feel is incomplete, and I know this because you screen name says it all. You are not you, but instead you chose to be "his" girl.
Take a moment to make a list of all of the things you like about yourself. When the right guy comes along he will have (in his mind) the exact same list. The one you broke up with was not the right guy, and you need to realize you can do much better. Be you --- not an extension of him, and good luck.
Because it made sense when you made the choice.. time and space from the situation will give you a better understanding about how you feel about him.
Sometimes relationships can be suffocating...maybe what you really needed was a little time out....you could talk to him and ask to stay friends, if he agrees then he probably still loves you- and maybe you can gradually rebuild your relationship on different foundations, slowly.
If not, sometimes it might not be HIM you miss, but the security of being "in a relationship" and the benefits of that such as affection...it might take a bit of thought to work out if it's HIM you miss, or being "in a relationship"
Snog a stranger and move on.
It takes time to adjust. You'll go back to normal after a while. :)
your confusing issues. the longing will subside... and yes you didnt want to go through "that" again so you made a wise choice. just give it a bit. but dont stop making wise choices.
I know how you feel.. that happened to me last year... but i got over it :)
Better figure out what your personal contract for a relationship must contain, and then set the rules. If the other you have chosen cannot live with the contract that you need to live by, then you need to go back to the search for a new person who can. Or you may find that you will have to change the personal contract for a relationship.
Maybe not x