Falling Inlove

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.

people who're in a relationship or just in love with someone, how do you know that its love and what does it feel like to be in love?
how do you know you like that person??

So, I have been in love with some one for years together now..... they don't know about my love for them and we still continue to be friends and relatives till date. By now I'm pretty sure that they will not see me as anything more than a friend and I wish to remain by their side "just" as a friend. So can u guys help me on how I should forget about them and if u have any experience pls share it with me! Because no one in the world knows about my love for them and this is the very first social platform where I wrote my unrequited love story.
And if u ask me why I'm not confessing.....its because they already have someone special in their life(although they are not married yet)......and there is nothing I wish for more than them to be happy together forever....