I second the recommendation of the help of a therapist if possible. You can certainly "work on yourself" but having the guidance of a professional can really accelerate things. It's also helpful to talk to someone who 1) is always in your corner and is your advocate and non-judgemental 2) is an expert in emotions, coping, relationships, and so on and 3) is not someone you already have a previous, possibly "tainted" relationship with. Good luck.