At last, I cry

I never really understood what love is. I mean, who does? Even the online dictionary doesn't help. A strong feeling of affection. I am currently 17 years old, and I have never ever fallen in love with somebody, and obviously haven't kissed anyone. It's not because I don't want to, but it's probably because of the weird personality I have and guys never even look at me. I am not outgoing, not bubbly, never laugh at jokes people make, because seriously they are really stupid. No one understands me, but no one needs to understand me, because I don't want sympathy from anyone. Why would anyone be sympathetic