If you asked you what chocolate tasted like, I could only answer that question by comparing it to other things. Only the experience of chocolate would ever give you full understanding.
Being in love is the same; you'll only recognize the emotion truly after you have felt it.
Remember, being "in love" with someone is not the same as simply loving them.
I love my parents, but I am not in love with them.
Being in love is akin to being obsessed. You miss them before they have gone when you know they are leaving soon; you are convinced that they are the most amazingly beautiful person in the world even when they aren't.
When they tell painfully bad jokes, it makes your heart flutter. Their touch is exciting even through layers of fabric.
Does that help?