I have been posting in newcomers for a while and have asked one or two questions before about MLC but didn't get any response. I thought if I started something here some of you experts might help me out.

Brief resume: W of 20 odd years told me at the end of Sept. that her feelings for me had changed last winter and she now loved me as a best friend and nothing more. 7 weeks later she was seeing someone else for parties and sex once a week. She said she didn't want anything serious with him. We continued to live together until 10 days ago when I asked her to leave. Only contact since then has been texts, in which she seems odd e.g. thanking me repeatedly for things I've done.

My question is, is this a MLC?

For:
she is 42 (today)
she suffers from low self esteem and acknowledges this> broke down about it 2 weeks ago
she has seemed depressed for a while
said her guilt was 'consuming' her
she has always been a big drinker but this seems to have got worse over the last year or so
obviously the affair, with another big drinker
feels life is passing her by
wears a mask of being ok, but it slips sometimes
has had recurrent dreams about a car she owned in her early 20s
used to be very concerned about her looks, isn't really bothered any more

Against:
Our relationship had stagnated so it might have nothing to do with MLC
apart from one time she hasn't been really unpleasant to me, although she hardened herself certainly

Currently, I know she's upset and is very tearful (other people have told me this). Is this consistent with MLC?

All help from you experts welcome.