Marriage, while I am sure it can be wonderful, isn't for everyone. I wish people would accept that. So many people get married because they think they have to. You don't have to get married to live a full life. Your purpose isn't to grow up get married and have kids. Your purpose is whatever you want it to be. If you're not interested in spending the rest of your life in a monogamous relationship, that's okay.
That being said, happily married couples are totally adorable
That being said, happily married couples are totally adorable