Attracting a relationship

I recently had the devastating experience of finding out my boyfriend of 6 years was lying and cheating on me with a trashy woman. She's divorced and has been dating all his friends, now she has him. I am pretty sure it was her doing, because he really has no initiative. He's now with the other woman, and I am so very lonely. The thought of them together while I sit home alone really bothers me. Even though he told me so many lies, I remember the good times, and I am very jealous and can't get over wanting him back. I was totally taken by surprise, he said we would still be friends and do things together, but I haven't heard from him. He said he would call to see how we were doing, my mom was in the hospital, but he hasn't called.

Can I attract a new, healthier relationship now, or is it necessary for me to be over my ex? I know logically, he was not good for me, but I still love him. I know I love the person I thought he was and not the real person he has shown me he is, but I still have these feelings.

And it's hard for me to believe I can attract someone better. If I couldn't trust someone after 6 years, how can I trust anyone, or trust myself to make the right choice?