I've never fought for anyone to stay with me?

There's a huge misconception right at the end of your query. There's a lot of social pressure from all sorts of sources for people to pair-up, but not everyone feels a need to share their life with another person.

If you're genuinely happy being on your own, then do that. If you feel that you have a problem with intimacy that is forcing you to remain single and you feel like that means you're missing out on something important, then seek professional help with that.

You shouldn't have to 'fight' to keep another person in your life. You do need to show some interest in them being around, be willing to invest time and effort into keeping the relationship alive and be happy to negotiate and compromise when the inevitable conflicts arise. If you have no interest in doing those things, then it's highly unlikely that anyone with any amount of self-respect will want to stay with you.

As for your (supposedly) happily paired-up friends, how they choose to live their lives is up to them. It's possible that you will indeed be the only one in your social circle who never marries. The flip side of that coin is that it's also likely that you'll be the only one who doesn't experience all the downsides of marriage, parenthood and divorce.

You say your parents want you to produce a grandchild. I'm also the parent of a daughter, and I say fuck that. Maybe this is a normal thing in the culture your family belongs to, but I think it's disgusting when parents pressure their offspring to produce kids. It's disrespectful and turns something that should be an entirely voluntary choice on the part of their adult child into an obligation.

The way your query reads, it sounds like you are an only child. If your parents were so bloody interested in having grandchildren, they should have decided to put up with the expense and hassle of having lots of kids in order to improve the odds of that happening. It seems that they didn't, so it's very unfair of them to put all the responsibility for perpetuating their precious genes on you.

Same. I never cared if someone dumped or threaten to leave me, always went like: "Ok" (walks away)

Girl We can be bad all by ourselves.thats your right to live how you want.maybe one day you meet that someone,till then enjoy life. don't worry or give shit what your friends say.just saying

Please don't let the only reason you have children be your parents wanting grandkids. If you want them that's another story. In terms if it's normal the question re: Not fighting for someone I'm Not sure. Maybe you haven't met anyone worth fighting for and maybe you have. So I didn't vote. I think we'd need to know you and the people you've dated personally to answer this

I’m not quite sure if I’m capable of answering this, but here’s what I know. You most definitely do not need a companion in order to be happy in life so please do not buy into that lie. It really depends on what you want in this situation. If marriage isn’t really your thing then that’s perfectly okay. Don’t worry about what your family will think. If being single is cool for you go for it. If you do eventually want to get married, then I would just keep looking for someone. If you don’t feel a connection right away that’s alright. When you find the one you’ll know. But seriously don’t stress about it. Relationships are kinda overrated anyways if you know what I mean. Whatever floats your boat.

If you are ok to be alone then non of the other things should not be a matter. Even for your parents, it's fair them to liking grand kids and ask, but they cannot demand or force you.