Is this weird?

I've been with my boyfriend a year, but we're very close. His bestfriend lives near by with his girlfriend so we all go out sometimes, and smoke and order a takeaway at there's. Both my boyfriend and his friend told me they'd like me to get on with the other girl a bit better (this was a few weeks ago? so today I text her asking what her and her boyfriend are doing tonight. I then sent screenshot to my boyfriend asking him if he wanted to do something.

He's replied having ago at me for 'making plans without his permission' and said it's weird I've done that, even though me and her text sometimes.