My bf 43M excluded me 40F from a Disneyland trip with his family and ex.

Our relationship has been strained for a while since I have been wanting more commitment from him to no avail. We fought a month after my son was born because he consistently failed to treat us as a family and spent time (4/7 days a week at his moms with his daughter and niece). We’ve been together 5 years and have a 7 month old baby.” After the month of no contact he messaged wanting to see his son and then asked to work on us again. Once again he began to be emotionally distant, doesn’t say he loves me unless prompted. Its Mothers day and I asked what he was going to do for his mom, he said nothing because he was going out with her on the weekend. Then his daughter blurts out they are going to Disneyland with her mommy, grandma and the niece. I told him I am not ok with them staying at the same hotel. And then he tried to say the girls are looking forward to it. I said I feel better if I came along with our son as a family. He said he didn’t think of it that way. I told him its a boundary for me. I feel like if he goes Im calling it quits. Im also mad at his mother, for even thinking this was appropriate. This is not how you treat family. Thoughts?