Sounds like you're my twin sister on the other end of the world.
Try 9 years of long term relationships, then abandoned into the single life of casual dating. Independance can be lonely, especially when you're used to co-dependance for so long. Will you learn to trust someone again? Quite possibly, just don't expect it to happen anytime soon.
At our age it's very tough since no one really wants to settle down, and there are quite a few out there who are more interested in what we have.. (i.E. House/car/etc.) than who we are.
So, i've been coping by going on the casual dates and living it up a little.... I'm just waiting for someone to come across that makes me settle down, not just because I want to commit to someone, but because of the person they are.. Makes me want to commit to *them*.
Not sure if this helps or not, but hopfully puts a thought or two in your head.
Justin