Re: need a man's perspective on this
I presume the guy is about as old as your friend. Anyway, from my standpoint, too young and immature to be the father of a kid. At his age, it is very rare for a man to want to have kids. Maybe he told her so because he wanted sex in the first place. She should have known better.
Of course he should respond to it. In one way or another, he should help financially, emotionally or both this young mother, but I am sorry for this child because he or she will come to the world fatherless, unless her mother is able to find a good substitute (grandfather?). The child, if it is a girl, may have difficulty with other men when she grows up, particularly if her mother (your friend) keeps telling her bad things about her father. If it is a boy, he may want to repeat in his later life what his father did to his mother. So it is a pretty difficult situation.
What I mean to say is that I would be especially concerned about this fatherless child and would try to provide him or her with the best education possible in order to make up for this essential loss.
If the guy refuses to help, I would not insist and leave it at that. It is hard to be a single mother, but it is also very hard to be quarreling about money and support and trying to get it in vain from someone who is not willing to surrender.
I hope your friend can find the best support from her own family. May she have a healthy child and be able to make friends with her child and lead a life happy enough together.