I've booked a counselling session for next Tuesday. I feel so ashamed and weak
From the responses, you can see a decent chunk of PNE Online regulars have had/go to therapy. I've been to three different CBT therapists and two psychiatrists.
Remember, weakness is not standing up and asking for help, weakness is sitting and doing nothing knowing there is an injustice happening and you could have done something to stop it.
Strong people make the changes they want, not the weak.
You mentioned that she says you aren't a real man, but by getting the help you need and changing your life for the better and not tolerating this, that makes you a real man.
There are plenty of weak men out there, but I don't think you are one, I just think you're scared and that's not the same as being weak.
Again, really good advice that I am taking on board.
Tonight, she's messaged naming the person she intends to sleep with.
How can anyone be so evil?
She's a narcissist as someone else pointed out. She wants your attention, but not for the right reasons. My guess is, and no disrespect to her as she's the mother of your child, but she's going to keep bouncing from online date to online date if you get what I mean. She isn't going to find stable happiness, but you can.
Bit of different advice, different approach.
If you want her so badly and dont want to leave (eventhough this is the best advice), then start treating her like she treats you, tell her who your going to sleep with - she wont like it and i suspect may come crawling back.
An interesting angle, although likely to end up way out of control with a child stuck between.