Matter of love

I came to thinking that it's always a matter of love. But what sort of love are we talking about? Indeed we love people, but how do we love them? Are there many ways of loving someone or just one? After hours i came to a conclusion. I love him, I love him like I love someone I've spent all of my life with, but i'm not sure i love him like someone I want to spend the rest of my life with. This is a slight and essential difference. And how do we understand if the first kind of love can turn into the second one? When do you understand if the person you've spent all of your life with can also be the person you actually want to spend all of your years ahead with? Probably you shouldn't even doubt it or ask yourself anything about it. Maybe you just feel it. Maybe you get this vibe you couldn't spend it next to anyone else. I'm not sure which one is the right answer, I'm not even sure if there's a right answer.
Think about it.