My first step out of Newcomers

[PositivelyMommy]

HI CIW, I understand about how you must feel, to have the love of your life think that you are not lovable anymore is a very bitter pill to swallow. I really don't think that she really doesn't like you,though. What I got out of it is that she doesn't like her life right now. She can't reconcile the fact that maybe there is something else which is more suited to her and in some way she attributes her unhappiness with you. That is why on one hand, you need to take responsibility for the stuff that didn't go right in your marriage and think hard on those things and try to remember what she complained about.
But on the other hand, you need to keep yourself from being dragged into HER unhappiness. That's where GAL and POV comes from. Take responsibility and control of your own actions and leave the rest alone. Let her deal with her own feelings and actions, those belong to her.

If she thrives on the single life and the last two years were a mistake for her then she will have to deal with that. She created the situation with you, not forced into it. She has to reconcile the fact that she will be a single mom of a small boy. Don't think that she will be HAVING FUN. It's no fun having to live with a guilty conscience. In fact, it's a lot of work.
If being single and living with a guilty conscience for the rest of her life is what she ultimately wants, then there ISN'T much you can do about it. You will need to move on and find your happiness with someone else. So you need to ask yourself, how much time you are willing to give to this love of your life to sort out her feelings. One year, two, three, five? You need to be totally honest with yourself and this is your decision alone. No one can tell you whether it is too long or too short.

It's a big risk I know but so is everything else in life.
But the bigger the risk, the bigger the reward, right?

Regarding Saturday night, can you arrange it so that she finds out from someone else? E.g. her co-worker or family member? You telling her might be a bit too 'in her face', that you are still waiting around for her reaction for everything. If she finds out by accident, then it's more like, 'Oh, he is having fun without me, how dare he?' See the difference?