Psychology tells us that not all people are capable of love. Those that are considered to be sociopaths are felt to be unable to feel empathy and love, that it's a part of the brain/personality that does not develop. Pscyhological statistics tell us that about 1 in 25 people are sociopathic. It's also believed that many people who are narcissists, who have narcissistic personality disorder NPD, are also incapable of love.
Thoughts to ponder, does love rely on the presence of empathy to exist? Do people who are more empathic experience stronger feelings of love than people who are less empathic, or is it simply a different kind of love?
How do you feel about sociopathic individuals?
I don't think any one thing makes anyone a sociopath; it's a psychological diagnosis. Which means it's based on a medical model. That being said someone has to fulfull a list of 'symptoms'... there has to be consistent evidence of repeated behaviours that indicate sociopathy. There are very specific diagnostic criteria involved in order for someone to 'qualify' for the diagnosis. It could be possible, but it could also be so many other reasons for the behaviour as well.
People who withdraw signs of love and affection when angry or mad could have many different reasons for that happening. It's also impossible to tell what is going on inside another person. The absence of expression of love doesn't necessarily equate to the abscence of love. The only person that knows is that person.
I think there are all kinds of people, and all kinds of ways of loving. So I don't think someone's love is necessarily less authentic or intense because they can have love 'end' or turn off for them. Some people, once they love someone, they don't stop, and their feelings will change and evolve over time, but they might never really feel as if they've stopped loving them. Maybe it's the memory of love that is powerful enough to keep recreating that same love over time for them, I don't know. I do know other people though, that say they've loved and then stopped loving. I don't believe the former love is any more genuine than the latter. I think we just have differently wired emotional brains. Maybe some people can turn their love faucets on and off. Some people have leaky faucets, even if they try to turn it off, once it's been turned on, it will continue to drip forever.