friend.

Single Friend
Main Entry: 1sin·gle
Pronunciation: \ˈsiŋ-gəlˈfrend\
Function: adjective

1 a: it means that you are alone, not lonely.
you maybe single but you are always surrounded with friends and family and you are a stronger person not to be scared to venture life, yourself.
1 b: When you are currently not in a relationship with a significant other. It usually does not bother you, but the problems start when selfish and inconsiderate "involved friends" rub in the fact that they have someone, and start saying they "love their oh-so-sexy boyfriends/girlfriends" and start going on and on about what he/she does for them, CAN do, and blah blah.
NOBODY CARES HOW "GREAT" HE/SHE IS TO YOU!! If you're taken, and love your partner a lot, then good for you, but for goodness's sakes, at least show some consideration for SINGLE people!

Well do me a favor and leave me as the single friend by keeping me out your relationship.
I can't say that I've witnessed love and I've never seen it close. I have yet to find a couple around my age that I can say makes me wanna even get to that point. I'm fine being single because if that's what love is than trust me I don't want it.
Talk about your partner if you want to.. but.. just calm down about it. Your life does not revolve around him/her, so don't act like it.

Some people say being in a relationship is the happiest thing for a person, but being single is just as equal to that.