Honestly most of the time I just dont give a crap.
Back in high school, I got bullied alot. And while I dont work a job these days and havent in probably a decade, when I DID work, it used to always be in places where dealing with customers was constant.
Both of those two things taught me something: People are jerks/idiots/morons/nasty. Not to mention shallower than a puddle in way too many cases.
One reason why I never get envious of the friendships of others: Alot of those friendships arent real. Too many are the fake "look, I have friends, SEE HOW SOCIALLY ACCEPTABLE I AM, EVERYONE!!!" sort that are more about improving one's perceived status, than actually caring about the friend you're with. If you actually pay attention to the behavior of others around you, you can actually freaking WATCH this happen. But with the advent of social media, it's not exactly hard to spot now. It's always been there, but that brought it out into the spotlight.
Dont get me wrong, I have had friends, but very, very few. Just one, at this point. One of the only genuine ones I've ever found... believe me, they're rare.
Now, as for romantic relationships? One word sums up my thoughts on that: "UGH"
Just... no. Absolutely not. Not happening. Frankly the idea disgusts me. I already hate most people enough as it is... why in the numerous hells would I want to be essentially tied to one on a permanent basis? It just means more responsibilities, and more of my time being required by someone else. And... all that physical affection. Again, "ugh". I dont even like hugging anyone (well, dogs & cats are the exception). The very concept of freaking kissing someone.... uuuuuuuugh. I honestly cant even watch someone do that. Or listen to it. Disgusting.
So, I go out of my way to make sure that will never happen. I dont flirt with anyone, and if I think someone's getting flirty with me, I leave (provided I even notice). And I'm not exactly the most pleasant person, and some of that is absolutely on purpose. Keeps people away. Granted, I barely interact with anyone outside of the family to begin with.
The fact that other people get "happy" due to being in relationships means little, as far as I'm concerned. People get happy over ALOT of random things. There are those that get happy over jumping off a freaking bridge with a crappy parachute. Sure doesnt mean it's a good idea to try THAT.
There, that's my completely useless thoughts on that matter, you're welcome.