My friends went on vacation without me, and now I have no one to hang out with for 3 weeks. 
That sucks, I'm sorry to hear it. Did they at least ask you first?
Yes but I couldn't go because of work. Guess I will have to suck it up and be lonely for a while.
At least they asked you, that's good. It will pass in no time and you'll be hanging soon I'm sure,