You have a situation that I understand, but it's not an easy one. You feel that you gave and gave and just wanted to receive. The problem is that she isn't in the relationship, so why should she give you anything? When she said she didn't feel anything for you and that she didn't want to lead you on, that's what she meant. It is a little silly to expect someone that doesn't want the relationship to give into it.
So, my suggestion: Take that energy that you've put into being her slave and put it into getting your own life and making the best one possible for your child. Right now she isn't worth all that effort. That's not to say that you can't be friendly and show you care in little ways, but you need to find your own life again. Find activities away from her. Take your son to things. Meet other people with similar interests. She needs to see that you have a life that doesn't revolve around her. You just might find that if you quit doing everything that she'll take up the slack. If not, you might find that she has nothing to offer you.
Me
In the end, it's not the years in your life that count. It's the life in your years. Abraham Lincoln
It is hard to fail, but it is worse never to have tried to succeed. Theodore Roosevelt
