My (20F) boyfriend (20M) told me he had a sex dream about me and my best friend. Am I overreacting for being upset?

My boyfriend recently admitted something he’s apparently been keeping to himself for about two weeks, and I’m not sure if my feelings are valid here.

He told me he had a sex dream involving both me and my best friend. What bothers me isn’t just the dream itself, but the fact that he sat on this information for two weeks and then brought it up like it wasn’t a big deal.

When I got upset, he basically told me that he can’t control what he dreams about and that there was nothing for him to apologize for because it was “just a dream.” Logically, I understand that people don’t choose their dreams. I’m not accusing him of intentionally having it or doing anything wrong in his sleep.

What hurts me is that it involved my best friend specifically, and when I expressed that it upset me, he didn’t really seem to have much empathy for how it made me feel. He mostly focused on the fact that he can’t control dreams and therefore didn’t think an apology was necessary.

I don’t even know if I’m looking for an apology for the dream itself. I think I would’ve just liked some reassurance or acknowledgment that hearing something like that could be hurtful.

Am I overreacting? Would you be upset if your partner told you they had a sex dream about you and your best friend, or am I taking this too personally?