Luc, how do you know if you're in love?

I was asked this a while ago and I kind of dwelled on the question wondering how to give the best possible advice. In the end I came up with this...

'Hey Josh,
I think you know you're in love with someone when they are the first thought you have when you wake up, and the last thing on your mind when you close your eyes.

There should be the butterflies in your stomach when you look at them, and you should be willing to do anything to keep them safe, to give them everything you have.

If you ever find yourself holding something back, then you aren't truly in love with that person.

Hope this helps, let me know what you decide?'

I'd like some feedback on this if you have some other views.