I'm surrounded by romantically-inclined people who insist that you're either in a relationship or you're gay. I mean, can't a man just choose to be alone for the sake of being alone and not wanting a girlfriend? Damn it, society.
It doesn't help that countless media outlets push the romantic relationship. TV commercials, TV shows, countless countless countless songs on various forms of the subject, tons upon tons of novels, etc. etc. Whether the media is produced because it sells well or because the people making it also believe it, the massive surrounding of messages both conscious or subconscious push that relationships are "normal" which means that people who pursue such romantic relationships are "normal" and anyone who does otherwise must be "abnormal" and/or "gay", because that's just the way the world is (as depicted via the media, in this case books, television, music, etc)
I assume that this has been a subject of society for years upon years in every society and civilization over the ages, because people
are social creatures, scientifically. There's probably those asshole hormones to blame for it too.
...I sound like a crazy ass conspiracy theorist. "It's all them dern left-wing medias, they want to brainwash us into puppets for their crazy ass evil liberal agenda for a new world order where everyone loves one another! It's all a sick conspiracy! Thank God I have my tinfoil hat!"
Personally, my family seems quite laid back on the subject too. My parents don't bug me about it, my friends are neutral on the subject nor do they bug me, occasionally it's been suggested or mentioned in discussions but usually the topic is dropped quickly.