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.

i have this friend who really likes a girl who i think is sort of out of his reach AND she's already dating someone but he's like literally IN LOVE with her. he keeps talking about her and asking me about her, and he finds the littlest coincidences to say things like we're soulmates and stuff like that. honestly, i don't mind him doing this but it's gotten to this sort of "hopeless" point and being around him is getting draining (probably because he ignores me when i try to politely tell him that the person he likes is dating someone). i don't really know if i should be fr with him or not because i cherish our friendship and i don't want him to be heartbroken, so please gimme some adice :(