He broke his agreement with his roommate, causing her to fear her home had been broken into and then he minimized your very appropriate reaction to being held at gunpoint.
He caused this.
He doesn't value his roommate's boundaries and he doesn't value your well-being.
The very least you should expect and count on from your partner is that they say sorry when they hurt you. Jesus Christ, the bar is so fucking low.
I'd end this relationship.
He caused this.
He broke his agreement with his roommate, causing her to fear her home had been broken into and then he minimized your very appropriate reaction to being held at gunpoint.
He caused this.
He doesn't value his roommate's boundaries and he doesn't value your well-being.
You deserve better.