Inferiority because of failure in meditation

I've tried hard to practice meditation - Anapansatti & Vipassana but I just can't concentrate on my breath. Now, I'm feeling inferior as if I can never concentrate my breath or get rid of my inner problems/ sufferings. I feel as if peace or enlightenment or eradication of suffering is not for me. After proper analysis, I've found that I just simply can't concentrate. So my questions are - What are necessary & sufficient condition to get enlightened? If I don't have those qualities how can I develop those qualities? What I would have to do? - How to concentrate provided I have tried my best to concentrate my breathing but mind wanders away in no time. It is making me sick thinking I don't posses qualities to eradicate my own sufferings. It makes me feel as if I will never be at peace. Note: I have been into 10 days Vipassana course also. Anyone help me.