What is love?

I'm thinking that since I am 44 and have been married for almost 17 years, I had better get to answering that question, but I don't know what love is. In attempt to figure it out though, I will list what love is NOT:

• love is not a computer game.
• love is not just sex.
• love is not a pretty face.
• love doesn't go away.

I should know more. I have a husband, and have had men say they love me, but it seems to come with the caveat that I don't take them seriously or love them back.

All I know is right now, I am feeling an emotional void, despite the fact I should be perfectly happy. Hmmmm?