Give me opinion please: Should I give up wooing her?

Here is my situation:

My life has always been a huge burden to most around me. I understand that I'm not a romantic kind of person like casanova Nicholas Chan and Nicholas Darren. I admit that I am not just an average person. This is because I always make mistakes, learn from then, the inevitably, make even more mistakes. Can you believe it? I don't want to make mistakes. I was born by my parents as a clumsy bastard.

There are two things in my existence, the first is something I don't mean to boast, the second contradicts the first. First would be my soul, or easily referred to as mental strength. Hearing from my counselor once, I am an intellectual genius, only because of the second which caused my status downfall. Second is this weak medium in possession of mine: this fucking clumsy and weak body. My limbs can never be stable, I run slow, jump slow and low, the body easily give in to asthma, the fats, THE FUCKING FATS!!!!

Okay, I shall quit giving introductions about myself. Rather, I should say bout her here. That girl I loved, I kinda understand her, though cannot jump into conclusions of her true personality. What I know is, something mutual to a lot of people: She can never stand loneliness. It's as though, die die must have friends around her, or else will feel unsafe. Her life can be compared to an iceberg; the one which sunk Titanic. Small to the eye, HUUUGE below the water surface. Once we were good online buddies, we played Maple and other stuff. Now, after that incident of my "Do or die" moment, I managed to say somethings to her, felt like the first time I accomplished something big. I thought this was the first step. Then, during her birthday this year, I was the first to post on her wall. Then, two days later, I gave that pendant meant as a symbol of happiness. Really, it wasn't a proposal, why the hell would I do that? Apparently, she had misunderstood me, messages weren't replied, started to avoid me.

So... Which would be more important, happiness for now and condemn to eternal unhappiness later, or true happiness after sacrificing my youth now?