To answer your question specifically about MLC, the first thing to consider is, if this is MLC, would it affect your working on a solution to rebuild your M?
Second, one of the primary aspects of MLC is the C... Crises... and this is not an overt crises (ie. a problem in the M), rather this is an internal crises within the person them self. Just because they're re-examining what they want in life, does not necessarily mean they are in crises.
If you really want to believe it is MLC, then read up on as much MLC resources here (and there are other resources "out there" as well). Educate yourself on it if you feel it may be helpful.
As a consideration, look on this board and the DR book regarding the WAW syndrome. While it is often written as a gender specific situation, I feel as I believe others do, that it can relate to either gender.
And finally, if you truly do wish to reconcile and rebuild your M, it is highly recommended that we (the LBS) work on ourselves. Become the best person we can become at this time of opportunity to grow, and become a person that only a fool would leave. And if it helps save our M, bonus. And if we end up D, then it will help us in any future relationships we may have.
FWIW, I hoped my W was MLC... and when I learned as much as I could... I started wishing it wasn't... and what I found was... in many sitchs, it really isn't a cut and dried, black or white, thing... I'm still not 100% convinced my W is MLC, but there's certainly strong leanings...
So, questions for you:
+ other than the spew (and a significant number of us have been witness to that bunk), what are some of the actual complaints (valid or not, in your opinion) that your H has of you?
+ what are some things that you actually would like to change in yourself (that might be negative) or make better, that might benefit you in your M or help you in a general sense?