['Every single person I know got to go on a vacation this year except for me.', "I'm so sorry to hear that. Is there a reason why you couldn't?", "I just don't have the funds or time away from work. Even my sister and her husband, who are as broke as me, went on one."]
To be fair, travelling is expensive and probably overrated to a certain extent. I hope you do find the time to take some time away from work so you can enjoy yourself though.
Every single person I know got to go on a vacation this year except for me.