BL, time heals all wounds. Admittedly, every wounds heals at a different rate, but eventually even the worst wounds heals. Obviously, proper care can speed the healing (IC, DBing, etc). But the Vapo that posts here today is in a completely different place than the one 6 years ago. I am 3 years past BD, in piecing and Ring, and you cannot even compare me to where I was 3 years ago.
10 months is a long time. It also is a drop in the bucket for most of these things. You obviously still have a lot of work to do, and you admit this. Worrying about whether STBXW and OM work out or not is not healthy. Just keep working on that detachment and moving on. Plenty of LBSs skip the work and then are set back when their XW marry the OM, or start dating someone they don't approve of, etc. Proper detachment says "Her crazy is no longer my crazy." And wouldn't give two craps what the XW is doing.
So keep doing the work. Keep posting here. Keep moving forward. All this will be in the rearview mirror one day.
M(53), W(54),D(19) M-23, T-25 Bomb Drop - Dec.23, 2017 Ring and Piecing since March 2018