One piece of advice I can give anyone standing in the doorway of piecing is to increase GAL during piecing phases. My sitch is tough because I truly believe my W has a mood disorder which I either deal with or move on. My W is ACOA too but she chooses to not deal with her issues because she doesn't "like" counselors.
Either way I still have some work to do on myself. I've learned alot about this stuff last time around and certainly will not fall into the trap again. I do know this I am not going to allow 6 months of sexless silent treatment again.