I've dealt with the past in questionable ways. I basically cut everyone out of my life who knew me before, with the exception of family and my ex. I even started going to new stores and other establishments, unless I absolutely have to go to one I used to frequent. When I've had my surgery, I'll take the final step forward and move away.
Although I can't say I'm overly pleased with the time I spent as female, that isn't the problem in and of itself. When people find out about my past, even the supportive ones hold it against me. "Oh, you were once a girl? From now on you are imbued with every feminine quality I can think of!" They just don't treat me the same, and it's like they can't accept that I am 100% man.