I go on holiday on my own all the time, my japan trip was with a friend, and I often go on weekend mini breaks to Milan or whatever with my friends.
I would like to go with DB but he wouldn't want to try shoes on in Milan or put a dress and heels on and go drink giant cocktails in NYC so I don't take him those places, he WOULD do those things with me because I enjoy it but he wouldn't enjoy it, so I would rather do it with my friends as they'd genuinely have fun.
I will definitely continue to have holidays with my friends
DB lets me do whatever I want and I refuse to feel guilty for making my more money and being able to go away more than he can, it's just the way life is.
Yes I would have loved to take him with me to Japan, but he couldn't afford it and I couldn't afford both of us. He didn't want me to let something I really wanted to do slip through my fingers so I went and he stayed.