She hates me, I miss her. Is there anything I can do...

I dated my best friend, and it got bad. She was very jealous, and got controlling near the end because of her insecurity. It made me really stressed out, but I loved her so I stuck it out, but I was a mess at the end of it. We split up, she was back and forth, promising to change, then hating me. She got into coke, I was stressed to begin with. She started hanging with my friends all the time, and freaked out whenever my name was brought up. She would call me every name under the sun. I don't know what to do. I do know I miss her., and that she wasn't like this for the first 2 years I knew her. First year and 4 months being friendship. She tells me she hates me, because of me talking to a couple friends about sh*t that would happen in the relationship, not sexual just the controlling stuff, because I didn't know if it was normal or not anymore. Should I just give it time? Or what should I do?
She hates me, I miss her. Is there anything I can do...
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