I don't know if I want to start dating again, what should I do?

So basically a girl likes me, to which I don't know her but a mutual friend said she found my Facebook profile cute and wanted to talk to me. I don't know however if I am ready to date again or anything. Partially cause 15 months ago I got out of a controlling abusive relationship with my ex girlfriend who I soon discovered had been cheating and lying to me during the relationship, along with her insane manipulative mind games. After that relationship just a few months later I had a thing for this other girl who I never dated or anything, nor did I intend to for several reasons, but she very much reminded me that I there are better people out there, we were friends in this group but lost contact given one of my ex's crazy rules which I stupidly obeyed was no talking to other girls altogether, and well she was a girl so I didn't talk to her naturally. Anyway she moved elsewhere in the country I didn't feel I had enough time to properly connect with her to build a proper friendship, and in the autumn I moved on from her, but knew it wouldn't have worked as if nothing else after the trauma I went through I wasn't equipped to date again for a long time, but since her I haven't had a thing for anyone.

Though that is part of the reason I am unsure how I feel about dating right now, I also am in such a weird state in my life right now, like I feel there is nothing solid beneath my feet so dating hasn't been a priority for me ever since. It's not like I have ruled out dating...