My best advice is stop worrying what she is doing, who she is dating, what your friend is saying.
Do your own things, make yourself happy, and treat her with respect when you interact with her. Respect means, look at her when she talks, listen, do not interrupt her, do not raise your voice, do not bring up talks about the past. If she brings up anything about your R. Just tell her, whatever happens, I am always there to support you and if your happy, then I am happy.
Your going to earn her respect by showing her, you can be this Man who can handle the situation with respect. Your going to make changes for yourself to be a better person. You don't have to tell her anything about your positive changes because Actions speak louder than words.
In the end you will love yourself more, even if it doesn't work out.
