i'm trying to give SOBO advice so that he can keep his relationship.

If he shows her an understanding and willingness to be there for her through this, and shows that he's thinking of her and not himself, she will think of him and not herself.

That way they stay together or she leaves, and if she leaves he knows that he wasn't the reason, she just made a choice, and he won't blame himself.

But if he acts like a jealous guy who thinks that she is going to leave him, she is going to think he doesn't trust her... if he is not there for her, she won't think he cares... that will mean that she will leave, and he would be the reason.

Now what would you rather be SOBO?

Would you rather comfurt her and show that understanding.. so that way you show her how much you care by not thinking of yourself?

Or

Do you distance yourself from her and show that no compassion which makes the decision easier and YOU being the reason she leaves and then you will be looking back on things you should have done better and start blaming yourself?

Your choice.