Which would you choose and why?
I chose being single.
From observing all the relationships/marriages I have witnessed over my lifetime, I have come to the sad conclusion that a "good" relationship is a fairy tale.
I think my main concern when it comes to people who really want a relationship is that often times they want to be in a relationship for the wrong reasons, ie, so they don't have to be alone. And that's a dangerous path because it easily leads to the things I described earlier (becoming needy, getting pissed at the other person if they want to hang out with other people, being constantly afraid of losing their companionship and thus going to extremes like giving them everything you think they need, etc).