<human>: My boyfriend, T, and I have been dating over a year and I have known my best friend, C, for 4 years. C and I live 200 miles apart and probably see each other 3-6 times a year. C asked me if I wanted to go on vacation and I said yes. We will be going to a music festival in Canada and I'm very excited.

The problem is I'm not sure if its rude not to invite my BF. All of my other friends have met T except C who hasn't seemed that interested. While everyone else, was excited to meet him, she never asked about him, and even when she was in town she had "other obligations." She also doesn't ask about him when she calls, it's like in her mind we are still the single girls of our college years even though I'm in a serious relationship now.

T really really likes music festivals and it would be so much fun for him to be there. But C isn't currently dating anyone so it would only be the 3 of us. Previously when I tried planning a trip to TX for a festival for the 3 of us, neither was too keen on the other going (C because she would be a 3rd wheel, T because he wanted alone time together). It was so stressful I canceled the whole thing.

What do I do? T has expressed interest in taking a vacation w/me, and planned one that I won't be able to go to due to work/not really being equipped for the environment (long story). But I also don't know how many vacations I can afford this year. Is it rude for me not to invite him? Would C feel awkward if I did? I know if T planned a vacation without me, I would feel bad.

Give me a shortened version of the text
<bot>: Best friend invited me on vacation, doesn't know/not interested in my BF. But I feel bad not inviting him along when I know he would enjoy it.