sorter

So I (f23) have an art piece on display at a museum across the country. It’s a place I’ve always wanted to visit anyways and I figured while my piece is on display I should make it a trip to go see it. I am not great at driving in larger cities and have never solo traveled so I wanted someone to come with me. I asked my dad (M46) and he said yes, but he would have to ask his new girlfriend (F37) who I just met last week about it. I joked and asked why and if he needed permission to go. He said no and that he was going to invite her to go aswell. I instantly shut down, in my head I thought it would be a trip for the people I invited to come enjoy one of my biggest achievements. I know it’s rude to say but brand new gf isn’t really someone that I considered bringing to something so important to me. I just said oh, and he got very offended and hurt and said if i invite him somewhere I should expect to invite her too. I understand that, I really do. But meeting her for the first time last week, I don’t know her well enough to be comfortable with that. While they were here visiting I got in an argument with him about her acting weird and all he said was that she’s going through things. They are constantly cuddling, touching, lap sitting. I love that for him and I’m happy for him but it’s extremely awkward for me. My parents have been divorced since I was a toddler and have never witnessed either of them in a relationship like this. I told him I didn’t really consider that and I’d have to think about it more. He was very hurt and I feel bad. AITA? U