I thought I would venture over here from Newcomers.
I don't think you really healed from your D. I think all this pain you are feeling is residual. Your BF was a Band-Aid for you and it took away your loneliness etc. Now he's gone and you are mourning 2 relationships IMO.
I was advise against dating. Give yourself the time to heal. I rebounded once a long time ago and the R didn't last. I was devastated. My IC said I didn't heal from my first break up.