Can I fix this broken relationship and how?

My DOB (f) 7/19/65, 7:23 pm Chicago time, Cancer/water, moon, blood type O, Snake.

His DOB (m) 7/ 23/73, but uncertain birth time, Wichita, KS, Leo/fire, Sun, blood type O, Ox.

We had an amazing relationship, incredibly intimate and stabilizing, both codependent, so it had it's ups and downs. Then I was put on a medication that changed my personality, made me anxious and caused many arguments, insecurities, much relational strife. I left for a time to get some space to think and finish my home sale, etc from my divorce. (He was divorced also.) I planned to return. I broke his heart and trust, not meaning to. How can I remedy this? He says he does not want me back, ever. Yet, I feel he is my soul mate and I am completely lost without him. Together 7 years, he gave me such strength. Apart for 2 and I feel like I'm dying.

I'm trying to respect him by giving him space and time, but he only seems to hate me more. Is it just a front that he says he has a girl friend? He told me once, if we didn't work out, he would never date or marry again. I am desperate, but trying not to show it. I want him back like I need air to breathe.