My child's father dumped me

After almost 2 years of me supporting him emotionally, finacially and physically. After him going to the army and me being the only person to write him. After traveling from North Carolina to Missouri at 34 weeks pregnant. After begging my parents to let him stay with until he went to AIT. After taking care of our son alone. After proposing to me a week ago. He decided that he wanted to be able to experience other women and get his dick wet and he dumped me.