TL;DR: best friend (25f) hates bf (33m) for no credible reason IMO (a rumor she heard from me way before we were dating that I later found out was false via other parties - she has never met him in person until this weekend). She set boundaries to keep these two parts of my life separate. That boundary broke over my birthday weekend - AITAH?

So, back in September, I started talking to my boyfriend. We worked together for years, but didn't interact too much outside of work things until last summer. Before we started dating, there was a pretty problematic rumor that went around and I of course gossiped to my best friend about it. When we started talking, I needed to get down to it and find out the truth, so I reached out to other parties involved (I didn't want my bf to risk saving face) and found out it was not true at all (our workplace is huge on gossip and the like). I fully believed this after getting to know my boyfriend, but my best friend wouldn't hear of it. We fought about it for like a month, but decided our friendship was work more than this and set boundaries instead. This was hard for me as I always dreamt of my boyfriend and friends being good friends, but I got over it and was quickly comfortable with it, because I realized this was always the case - anytime I had a guy in my life, she didn't like him for some reason or another. She didn't expect me to have her expectations, but made it known that ours didn't match and I always felt uncomfortable.

Today is my birthday, and I decided to have a friend hangout this past weekend and spend this coming weekend with my boyfriend and family. Well, my boyfriend and I spend a lot of time together and I still wanted to spend some time with him last weekend, so I went to lunch at our work and then invited him to spend the night at the hotel when he was done with work, anytime between 10 and 11. I figured the night would be dying out and anyone who wanted to still hang out could hang out and drink in the room with us. For lunch, he paid for everything without me even knowing. The plan was to split the check evenly and wed share a few pizzas and appetizers unless you wanted something different, then you would be on your own check. My best friend and one other friend decided to order MORE of what I already had for appetizers, so we had a ton of food left over. Then my boyfriend paid for it all, including theirs. They said NOTHING. Not a thank you to him, not a that was kind of him to me. Nothing. I felt so terrible that he did that and they weren't even grateful. At the end of the night, they mentioned smoking and playing some games. I said sure, but I'm inviting BF because he is waiting for me and has to wake up early for work. They get out of the car, say a quick goodnight, and go to bed while one other friend came over and hung out for a bit. I didn't expect them to join, but a "I had fun today, goodnight!" would've been nice.

I understand she set a boundary, but I let her know he would be making an appearance or two, and she said she figured he would be there. plus, its my birthday, my boyfriend, I should have a right to have him there, right? She spent the whole day not spending time with me anyway, just kind of in her own little corner. She complained here and there, and even though I spent weeks planning and making sure everyone was happy, she didn't give any input and then seemed disappointed. AITAH?