What to do about a tough breakup?

I recently broke up with my girlfriend of almost 2 years. I was living at home after college and she was renting. We fell head over heels in love with eachother, and I had just got out of a 3 year relationship when I met her. We became inseparable. We never fought in the beginning, but we loved hard. I bought a condo for us to live in. It was in a new area and I met a lot of really fun people. I wanted to have both lives, the girlfriend life, and the friends life, but I found it very difficult. 6 months ago I lost my job and began to spiral downward. I had some prospects in line, and thought a new venture was going to work out and it never did. Eventually I began to feel alone and feel like I was not getting from the relationship what I needed. We had plans to maybe try living apart, but I always convinced her to stay. One day I disappeared on her and she was worried sick about me. The next day she returned from a business trip and decided she was leaving. She said we were going to try to work on things but I never believed her wholeheartedly and the uncertainty of our relationship began to weigh on me.. so for the next month we talked on the phone and kind of kept tabs on each other. We hung out a few times, and 2 out of 3 times were good, but I just was not getting the time and attention I wanted. One time was not fun at all, really. she said she wanted to clean some stuff out of the closet. I boxed her stuff up one day and she came in and looked very upset. She said she was not 100% done with this, but now she was close. Its now been 2 months since she left and I still think about her. I still talk to her. She says she cant help me but I cant stop thinking about what could have been, all the petty arguments and stuff. I have dated one other girl so far, but I dont know what to do to get over this. Any suggestions?