I need help deciding if I have a right to be upset or not

So my boyfriend and I have been in Colombia for 2 years and have our flight to move back to the U.S in 2 weeks. We were planning on moving back sooner but delayed because of covid. We rented a long term stay Airbnb to give us time to find our own place.

So we’re talking and he tells me that he’s going to extend his stay for another month. He isn’t ready to go and his best friend wants to come wfh along with him. So at the time, trying to be the “cool/levelheaded” gf I said “oh ok that’s cool” but it’s really getting to me now. I think I would have felt a little better about it if he has asked me my opinion first.

On top of that- not a big deal (or so I thought) my birthday is next month and I’m a little annoyed that he clearly does not care about spending it with me. I get some people don’t care but we’ve spent 3 birthdays together and I have made his birthdays the best he’s had (so he says). We did nothing last year for my birthday cause of covid and the year before that he forgot.

I suffer from abandonment issues from things I dealt with in the past so I really just want to make sure I’m not looking at this in the wrong way. He keeps saying how sad he is that this is the first time we’re going to be apart in a long time but like 🧐 then come?? He also said I should stay if I want but I feel like I’m bothering at that point. I would have preferred “I want you to stay with me” if that was really the case.

I do plan on talking to him but I want an outsiders perspective. I know we don’t always have to be together but it’s honestly making me want to just leave this weekend instead.