First, I am sorry to hear of your issues with a dissolving marriage. I agree with the advice posted above, including that your ex may try to sabotage any new relationships.
Second, it's time to hire a lawyer. There's often a lot of nonsense that happens in a dissolving marriage. It is in your favour that you don't instigate or respond in kind, as the judge will see through it if it comes to going to court.
Continuing counselling for the time being is a good plan. Your ex's betrayal of trust is something that needs processing over time. It's too soon to get into another serious relationship. Give yourself significant time to heal, like six months or more.
Crossdressing is not an acceptable excuse for cheating, IMHO.




So then it looks as if the chances your girlfriend will be accepting are fairly good? This is even more reason to be fully honest with her now, don't you think?
By the sounds of the girl you are seeing now it sounds positive. At least she didn't jump into bed at the first chance she got, that says alot about a persons integrity and it's a good thing to find in someone. As for telling her about Marina well there are two schools of thought on that, 1. you tell her now before you fall helplessly in love with her, If that happens it will be alot harder on you if she decides that it's not her thing. 2. Tell her later but she might not appreciate the secrecy this may cause further issues. Which brings us back to number one a world of hurt for both of you. Then again there is also a chance that she will be absolutely cool with it. Whatever you decide to do I wish you the best of luck
