It's really hard I know, especially when you find out that the jerk you thought you loved is a slime ball. Just remember that you are better off, you've got Bear and he doesn't, and that's the way it's going to stay.
Take it nice and slow, you've got all the time in the world now to meet new people, and you never know where you're going to find the next Mr. Right, or even Mr. Right Now.
Congrats on getting to stay in the house, what I'd do is a little bit of redecorating! Splash a little color on those old walls of yours, buy a throw rug, change your window dressings around, maybe go to Ikea, or even an outdoor market for some funky new/old furniture. You'd be surprised how much that'll make you feel better about everything!