No I wouldn't believe him.
But I wouldn't give enough fucks about his opinion after that to talk to him anymore.
So you in the OP's shoes would break up with the girlfriend over her secrecy?
No, bc the matter is clear.
Gf thinks she can handle it and does not want trauma counselling.
If I were her bf I would respect her privacy and let her work her shit out for herself.
Somebody telling me I don't need to know smthg bc I'm stupid and weak is an entirely different matter.
I can't be with somebody who thinks that of me bc our entire world would be predicated on him infantilizing me until I lose my temper and stab him to prove I'm anything but helpless/useless/dumb or w/e.
How would you respond as yourself in your equivalent of the OP's scenario then?
Couldn't it be argued that this is what she's doing to him in this scenario?
No. She did not say stupid and weak.
She said "don't tell."
Again, I would leave it alone and give her the chance to come to me.
I would question the friend's motives, tho.
It seems like a bit of a backstabby, concern troll kinda thing to do.