I need advice on why no one wants me?

I'm 17yrs and about 5'6 or 5'5ft. I'm a dark skinned black girl and my skin is about the shade of Naomi campbell or Jessica white.I'm a 36D, 138lbs. and my measurements are 28waist inch.39hips inch. And I have puffy breast length hair. I dress in all classical black and take care of myself, I have no acne or tooth defects. So why do guys don't want me. I hear they love confidents, and I used to be but they still pay no attention to me. I try to be friendly and nice but no guy ever spares a passing glance. I never had a boyfriend and all my life up in till high school I was called ugly. I don't understand why many guys go up to one or some girls but not to me. They say to be confident and I tried but still no one wants me. I feel ugly and so unwanted I want to kill myself. And want to know why?