Choc, my man. You gotta keep her on track. She needs to be reminded of your pain. Remember, she is not the one feeling it, and it is too foreign to her to keep it in focus. It is very easy to fall back into old habits. If you are serious about fixing this, you need to bottle up the resentment and anger, throw that away. Belly up to the bar and expose yourself once again....and then keep exposing yourself. I'm finding that in order for the relationship to flower you need to keep yourself an open book and realize that neither of you can read the other's mind. She probably won't open up until she feels safe, which could be a quite a while off (MrsGGB still isn't opening up 7 months into our recovery), so don't expect mutual naked souls right away. I know it is painful to do, BTDT. The good news is the more you do it, the more comfortable it gets especially if she doesn't crucify you for your feelings. That is where WWME came in helpful...they stressed that we shouldn't judge the feelings, only try to feel what the other is feeling. I am still trying to get MrsGGB to open up, and that my friend makes full disclosure harder to do, but do it you must if you want it to work.
You have a choice, either set aside your hurt and step back into the game, or take the ball and go home a loser. The relationship isn't going to fix itself, and since you are the one who has recognized the problem, the onus falls on you to orchestrate the repair. Sorry, that is just the way it is. You only other options are to get out of the R altogether or to wallow in the mire like Cemar, biatching about it incessantly but never taking the steps to correct it. I know you don't want that. You can do it guy, I know you can. Even you said it worked once before and you had 6 weeks of died-and-gone-to-heaven bliss. My gosh, it worked once...do it again! There is no miracle sure, and remember, a Relationship needs continuous maintenance. This isn't a one shot deal. This is going to be true in this relationship as well as a future relationship should you decide you really want to throw it all away (the next time around won't be any easier without taking the same hard steps of opening yourself up completely). I don't mean to come down hard on you, I'm jsut trying to tell you that this is the way that it is.