Not sure what else I can do to protect myself regarding OM and the mother other than to remain detached and not read anything into anything. The words, "There is nothing going on between us" came out of the same mouth that said "I'll never leave you for any reason."
Yep, I am sure you don't know WHAT to believe right now.
One day at time right now. Be patient. Like the others said. Continue working on yourself, GAL'ing, and detaching.