I'm single for the first time pretty much ever and I very much recommend thinking of things YOU like to do that may have fallen by the wayside (especially if you're prone to codepenecy that can happen). In my case it's art and LOTS of listening to music. I also joined a few MeetUp groups to encourage me to get out and socialize. It's been good. I think if you spend your time "rediscovering" (or even re-inventing!) yourself, you will find it very satisfying. Also, I'd write down all the bad things about your previous relationship so you can recognize and hopefully not repeat getting yourself in that situation again. It's no fun not being treated well (understatement) and you DO deserve better!
Wishing you the very best....
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Makes me sick to the heart, Oh I feel so tired. And the way the rain comes down hard, that's how I feel inside.
--The Cure