Really could do with some support and advice from you friendly people, as unsure where else to turn to at the moment.
Around 3-4 years ago, I started an affair with a married woman (something I'm not proud of, so please don't judge).
As you can imagine, this was a very difficult time for myself, partner and her now ex. It has also taken some time for her ex to come to terms and accept what has happened (naturally). My partner, as we are still together now, has always tried to maintain a friendship with her ex, as they have a child together. He has always been fairly difficult around this topic and has always 'worked on his terms' due to the difficult circumstances.
As we have moved further down the line, he has started seeing someone new, which my partner is now struggling to deal with emotionally, which is now starting to take it's toll on me.
She is lying awake at night sobbing, to which I am unable to contain my frustration. It is almost like she is grieving for their relationship now, having found out he is seeing someone new. She is also getting upset at the thought of another woman being involved in her childs life.
So, as things stand, our relationship is really under some stress and I feel like I am a constant emotional punchbag for when she is feeling down. She has even told me that I haven't done anything wrong, but that she is really struggling emotionally at this time.
What can I do? I'm worried that if this continues, it will break us up as I am really struggling to stay positive and not get upset myself.
Thanks in advance, I really appreciate your help and support.
ConfusedD