what is it?

As a 50-year-old woman, I know what sex is. But I really have no idea what love is. I love my family out of obligation. They have taken care of me so therefore I love them. But isn't love more than that? I don't think I am very capable of loving anyone. Now that's not all my fault. There was some abuse but I fault no one for that. It's just that before I die I want to know what love really is. I mean this journal entry in all seriousness. If you know what love is. Please give me some hints.
Thanks