A child flourishes most in the arms of two loving parents. They learn about relationships, compromise, and team work. I am a single parent now learning how to carry my child thru the grief of loosing a father figure. I have been a single parent before and am the product of a single parent. There is nothing wrong with raising a child on your own if you have to. Raising them alone is better than compromising for a fruitless or harmful relationship which causes more negative affects in the child.
I have found that single parent children tend to be strong and sometimes overly independent. Witnessing their parents do it all on their own often causes the 'do it yourself' attitude to become normal. Too much independents often contributes to control issues which can make relationships a little difficult.