dump him. You are using him. Spin it however you want, but you both need to move on. This will not likely fix itself.

You should share this with her, as she most likely already senses your fear. Start by letting her read this.

If you don’t tell her, then your relationship will likely fall. You may extend it for some time as a co-parent , but that will be harmful in the long haul.

I would imagine that even if she decides to exit she might still be helpful as a compassionate friend. Personally, in your place, I would accept that.

While fear is understandable and not abnormal, I don’t think any symptoms here is terminal. You will work through is as you will. And as long as you own your journey, then you will have the respect and help and love of others.

I am no expert, so just take this opinion with a grain of salt.
Good Luck !

I can say to you that you have started to heal already. You already understand that guilt was trying to take over. I can guess that you had a one night stand due to anger and retaliation, as well as emotional emptiness and despair. Those seem like normal emotions to me.

If you said no, I think the one night man should have slowed down a bit (and I have heard that in some locations, only yes from you declares consent.) That said, I don’t imagine you need to be too considerate with him should he show up again.

For myself , when my relationship was on the rocks, and my long distance partner slept with another man, I did not find it so hard to get past it. And the last thing I would want was for her to feel awful and disgusting and especially shamed. Best wishes !