Here's some closure for you. You were off and on with this man which clearly shows anyone here that you were not meant to be together. Get over yourself and let this man be a proper father to his son/daughter. You're not even friends now so get over him by forgetting him and accepting that you were never meant to be. Thank your higher power that you're not strapped down with his baby while he continues to ignore you and not want to be with you.
Work on your self worth by keeping busy, reaching goals you've set for yourself and doing the best you that you can be so that you get with a guy that knows how to value you and treats you well. You don't need no baby daddy in your life.
“The willingness to accept responsibility for one’s own life is the source from which self-respect springs.” ~Joan Didion