Another way to phrase the original top comment (which, btw, is very deservedly the top comment): "If you can't be happy on your own, there's no way you'll be happy with a partner."
Happiness comes from within. Pegging your happiness on something external to yourself - material wealth, social standing, another human being - is giving away all agency you have over your own happiness.
Happiness comes from within. Pegging your happiness on something external to yourself - material wealth, social standing, another human being - is giving away all agency you have over your own happiness.