Planet, haven't been in your specific situation but you are getting great advice here.......
I would not expect that it would be easy and certainly understand the discomfort you expect to feel. My sense is that if you have the conversation and take steps to address the "almost OM" situation it is very likely to make you begin to see the whole situation in a new light.
Everyone on this board will be around to support you as work on things.
Stay strong!
Me-48,W-51 M-22,T-24 S- 18,16,9 Feb-Jul '11 Away from Home, after initial B date Aug-Dec '11 Back at Home on couch Dec '11-now Same bedroom, room mates only Dec '14 W files initial D paperwork