After 2 failed Marriages, its understandable why he doesn't want anymore relationships and why have these Marriages failed? Id check this out before getting too deeply involved here as he may really just not be relationship material so don't be number 3 here. I understand its hard as you've probably fallen for him but its best to lose him now than in Divorce Court. From dealing with couples for several decades, I have a strong feeling that abuse (emotional or physical) may be involved somehow here. Good luck and please be careful
Run Forest 🏃
In your case 🏃 Anonymous 🏃
But you won't 🏃, you'll stay till you get hurt, then later ask "Help me leave" And I should have listened and 🏃. What can I do now. You know the answer 🏃.
Use reliable birth control.
The info provided in your question indicate that this man fails with women because he doesn't learn anything from relationships that dissolve. If he had learned a few things from those women, he would be going ahead into the next relationship with confidence.
All you should offer is friendship, and perhaps a bit of guidance, but I doubt he listens much to women.
From afar.
If someone has been divorced twice, they probably don't know what they are looking for.
The chances of your being "it" are minimal.