How does love feel ?

I've never felt love. It's hard to explain to be honest. I've had interests in some boys and I've even dated 2, but they've never passed the interest line.
I never get attached to them. I just find them attractive or funny or etc. I never feel what everyone calls "butterflies in their stomach". When they dump me or I dump them, I've never cried. I never felt angry. I would just tell myself "well whoops" and move on in not even an hour. I lost many friends over this because they would lose trust in me saying I "don't have emotions" or that I "can't be trusted". I do feel emotions. Just not as strongly as others ? I don't even know.

This makes me kinda sad because I see my friends with their crushes and boyfriends. They all seem so happy and I want to feel that happiness too but it seems impossible to me.

Am I just a cold hearted girl ?
How would you explain love ? I really hope to understand how it feels so that I will know what it is when I finally meet it.