I don't know what to do

My fiancé finished it with me 2 weeks before I gave birth after I confronted him about cheating on me, I don't know what to do I love him to bits still, his the father of my daughter an we act like a couple at home and at his parents place but Idn what to do, we last had sex this morning we are living together and bringing up our daughter, together but he said that he would never get back with me, we was together for nearly 2 years and we have our own lil family how can I fix it an put us back together as a happy family. Our lil girl I n the pic