My little boy is now 15 months old, but I'm replying to your post as I was also not able to breastfeed and can completely understand how you feel.
I was not able to give birth naturally (labour failed to progress) which filled me with huge feelings of failure. Then after about 3 weeks of feeding perfectly and being so pleased, he suddenly rejected the breast for no apparent reason. I went to doctors, breastfeeding consultants, chiropractors, and no one could help me. He just would not feed, screaming and arching his back, never feeding for more than a few minutes, yet when I gave him a bottle he took it like an angel and would drink the whole thing. I eventually gave up and put him on a bottle, managing to express for a while, giving him a mixture of formula and breast milk. I finally gave up and put him only on formula when he was 2 months old, I was depressed and exhausted and could not deal with expressing anymore. Like you, I felt like a terrible mother and a complete failure and was sure I would never bond with my baby. I would go out with my friends and they would all be breastfeeding and there we would be with a bottle. I was so disappointed in myself - maybe if I'd tried harder, or seen more specialist I kept thinking.
Now I look at my gorgeous, healthy little boy and the feeding issues seem very far away. I feel completely bonded with him, he's just as healthy as any toddler his age and what's best is my husbands bond with him, which he says came from being able to spend so much time with him and feed him when he was so little.