As you know, I'm on the autism spectrum and I don't really 'do' love for other humans. (Cats are somewhat different though!).
For example, I don't think that I ever really loved my parents. That doesn't mean that I didn't get on with them. It simply means that, while I liked them, I never really cared about them (and I've certainly never thought about after they died, other than to remember times in my life when they happened to be present).
Similarly, while I like my best friend a great deal, I don't actually care about him. If someone was to blast his brains out with a gun in front of me I wouldn't be particularly bothered about it. (I've told him that many times. Since he's also on the autism spectrum, it probably makes sense to him anyway!)
In my ideal society we'd use genetic engineering to ensure that nobody was ever capable of love, as I see it as an emotion which serves no purpose and simply gets in the way of rational thought. (i.e. I think that I'm better off than most others in society, not worse off, through being on the autism spectrum)
However I have to admit that there have been one or two people who (to some extent, at least) have 'broken through' to me as far as 'love' is concerned. In particular, many years ago, the young son of a single-parent friend came to regard me almost as a father and I came to regard him almost as a son. I still feel that way about him now, even though he's 41 years old. (He, and his family, are the most important things in my life apart from all of these ruddy cats, who also seem to be able to get me to display 'love' for them, even when they're driving me up the wall! Don't ask me to explain that though. I can't!).