AITAH for „ruining“ my bf’s birthday dinner cause I didn’t accepted to pay for everyone?

I (20F) have been dating my bf “Ryan“ (21M) for about a year. For his birthday this year, I wanted to do something special, so I told him I’d take him out to a nice dinner. Just the two of us and I’d cover the bill. He was super excited and agreed. So I made a reservation at a nice restaurant, put on a nice dress and was so excited to see his reaction. When I got there, I was surprised to see that Ryan had invited his best friend who also arrived with his gf. He hadn’t mentioned anything about them coming. I was caught off guard but thought why not having a nice couple dinner.

The whole time his best friend and his gf ordered a ton of appetizers and multiple drinks each. I started panicking a little because I realized this bill was going to be way more than I’d planned for. Toward the end Ryan leaned over and said, “Don’t forget, you said you’d cover it.” I told him I agreed to pay for his dinner cause of his birthday and not for another couple, I didn’t even knew was coming. He said it’s “rude” to invite people to dinner and not pay for them.

At this point I already thought wtf wrong with you and told him it’s ruder to invite people to a dinner that someone else is paying for without telling them first. I already had the feeling to explode out of anger so I just went quite and waited for the waiter to finally pay. When the check came, I paid for my meal and his and told his buddy that he should cover the bill for himself and his gf. Both looked at me as if I had insulted them in some way, saying I embarrassed them in front of the server. In addition to that Ryan even called me “cheap” and said I ruined his birthday.

All this happened last Saturday and since then he’s been giving me the cold shoulder and just answered my messages with insulting me for “embarrassing” him in front of his friend. Now I’m thinking about breaking up because he is not talking to me since one week already even though I wanted to apologize. Maybe some of you got any advice for me?