Legally separated but still married. Fiance left me. How can I get her back? how to rebuild trust?

My ex has dragged out the divorce 2 years. I filed before meeting my former fiancee who I truly love but my ex has lied to her and she believes horrible things about me which are not true like allegations of me having an affair with someone at work and other horrible lies but because I lied about not being married she rightfully doesn't believe me. How can I rebuild trust and bring her back. I know it's my fault for not telling her but I was affraid, I'm not trying to excuse my failure. I was wrong and should have told her. She won't say she still loves me but wont say she doesn't either so I'm praying there's hope. I'm truly not a bad guy and I do worship the ground she walks on and if she did take me back I would be completely open about everything. I have started counseling to make sure if she comes back that I can be the best person possible and have no baggage because she deserve a good man because she's had a really difficult life. It was my job to keep her safe and I failed. I would never fail like that again. This may be strange but I still feel close to my dad who ped and I talked to him about this and swore that I would never lie to her about anything small or large if she came back. I know many of you will tell me to move on because i will admit some men are just cheaters and lie but I'm not one. I use to thank God each morning that I woke and saw her sleeping next to me and prayed each night to God to help her feel better (she has a serious injury from an accident) and fall asleep holding her so she felt safe. I would drop my work to take her to the doctor appointments and alway put her first above all because it was my job to take care of her. I just don't know what to do. I gave her some proof to show some of the statements by my ex are lies but i don't know if that's enough. She won't meet with me nor really talk to me. I'm trying to give her space but I just don't know what else to do. She can't have anymore children because of her injury and I knew she was the last woman I ever wanted so I had a vasectomy to make sure she wouldn't get pregnant. She was and is the only woman I've ever loved and that's one of reason's my ex hates me so much. Please offer advise instead of trashing me because I already know what I did was being a coward, deceitful, painful and hurt her beyond anything a person should ever feel. thanks.