Also, does OW do things to try to replace you? Do your kids act like she’s replaced you? Or is this just your perception because you are hurt?
A mom can not be replaced. I had to be battle having another woman in my daughters life since she was in infant. My daughter is almost 12, and while they have a good relationship ( thank god) I most certainly never have been replaced and I am her mother.
I can also tell you that putting your feelings of being replaced on your kids ( not saying you are doing that) will cause them to distance, not come closer
I hope in counseling you focus on healing yourself and helping yourself with your anxiety and depression, rather than your ex. You should be your primary focus. You are independent of him you are absolutely your own woman. Love her and nurture her