A reader sent me this: http://myfriendsaremarried.tumblr.com.
Warning: Liberal use of the F-word. But it's silent. And the site sums up what it can feel like when "all my friends are married."
It works better as a joke than as a guide to life!
For one thing, partying is (arguably) for Single Life, not Single Life for partying. And not to kill the buzz, but the protagonist's anti-marriage stance might soften a bit under the right circumstance, e.g.
MY FRIENDS SAY SEX IS SOMETHING TO BE RESTRICTED TO SOMEONE WHO LOVES ME SO MUCH HE MARRIED ME AND I'M LIKE