darkages, for me the guilt I feel for my exdh is still there at times. I sometimes think it doesn't help that we get on so well.
My marriage was gut wrenchingly sad towards the end, and as you have said, would have ended anyway, OM or not. It has taken me a long time to 'get over' my last marriage. We were together 17 years and had so many happy times. yet over time the stress of two small dc, both working full time and running our own business - plus the death of his parents and several redundancies took its toll. We were both so desperately sad towards the end, but neither of us had the courage to end it. We were both so beaten down.
I am now in a place where I just focus on the good and I am blessed that our dc are happy and exh and I have a good relationship. But obviously there are things I still miss about my old life.
I miss not having my dc all the time. We have a 60/40 split which is very flexible, especially as they are now teens. But I still miss having them with me all the time and being a 'proper'family. I also miss my old marital home. Exdh and I spent a lot of money on it making it our forever home. I loved my big driveway and garden and how we had spent a long time making it just the way we wanted it. We sold the house when we divorced and both bought our own places.
A lot of people on here, and in RL could easily say 'well you made your choices - you ran off with OM' etc. And yes, I do accept responsibility for the choices I have made, even though it could just have easily have been exdh who decided to leave. We would've split anyway. Doesn't mean that i don't feel sad about the past sometimes.
I do sometimes feel guilty about my exdh. Especially as he has little family left in his life and has not met anyone yet.
I will probably get flamed for this, but I don't feel guilty about dh's ex wife. They too were heading for divorce and their marriage was doomed. They both made mistakes in their lives / marriages, way before dh and I got romantically / emotionally involved. dh and I were the catalyst in us leaving, not the cause. I refuse to take responsibility for my dh's marriage breakdown, that was between him and his ex wife. I feel awfully sad for dh's dc though. There life is very complex and upsetting now due to their parents splitting. They have not faired anywhere near as well as my dc.