<human>: Can you succinctly summarize the text in 1-3 sentences?

I [F/21] have been dating [M/26] for a year. 

We are currently in a long distance relationship, but I will be spending 3 months with him this summer. 

During that time my mother and sister will visit. We (meaning my mother, my sister, and I) had initially planned on doing a two week excursion together for my mom's birthday. I could tell my boyfriend I was a little bummed that I'd be gone for two weeks, but he was supportive because he's a really great guy. But recently my mom has been considering doing a shorter, 6 day trip to an AMAZING place that I've always wanted to see. And better yet, she invited my boyfriend to travel with us (they get along really well). 

I thought this would work out perfectly because he is obligated to take a two week vacation during the time that we would be going, and as of now we didn't have any other plans. So even though it is still tentative, I called him up and told him about because I was super excited.

Aaaand he didn't want to go. He said that he didn't want to spend half of his vacation with my family because he wants to spend it with me only. This is completely understandable, but at the same time we would still have the first week, and we have another week long vacation planned for later in the year, and we travel together about every other weekend. 

Two of my major flaws in a relationship are a) I don't realize how upset I am about something until after the fact and b) I can't talk about things I'm upset about right away, I need to take some time and chill out first. So basically I realize after we finish talking that I am really disappointed that he doesn't want to come, but by the time I'm calm enough to explain this to him, he's already sleep. I'll talk to him about it tomorrow, but my question is how do I do it? Because honestly, his reasons for not wanting to go are valid, but at the same time I was really excited for him to go and wish that would. Thanks in advance for any advice :)
<bot>: I was super excited to go on a short vacation with my boyfriend and family. He doesn't want to go, but his reasoning is totally understandable. Despite this I'm still disappointed and unsure about how to convey this.