What is love?

My cousin emailed me recently asking me what love feels life because she's not sure she loves her boyfriend. In all my infinite wisdom I had no good answer for her. How the hell does one explain a feeling that most of the time is inexplicable. I thought long and hard about a solid definition. Then I crumbled and did what any person would do...I googled it. I found this -
"Love is a feeling you feel when you feel you're feeling a feeling you never felt before."
So we can only have fallen in love once? I don't like it. But really there are so many aspects that lend themselves to the ultimate "love". It's not just that feeling, that makes you want to hump that person all day, every day. That's all good. But if that defines love, I've been in love several dozen times.
Dr. Robert Sternberg at Yale University probably defines it best. He says that love consists of three components: 1) decision/commitment; 2) intimacy; and 3) passion. When all three strongly exist in our feelings for another person, he says that we feel consummate love for that person.
It still doesn't give me a simple answer to email my cousin. She said her heart doesn't skip a beat for this guy, but he's so smart and funny and considerate. If he has a big bank account, then that's true love! right! I want you to ponder the definition of love--for yourself. And try to put into words what love means to you.