son father

i need some advice!! My sons father i begged for a year and a half to help me. Even give me a five minute break so i can get ready and he wouldn’t. I can count on one hand how many’s hes given him a bath and changed a poopy diaper and he is now two!! He somewhat helped with money but not a lot. We stayed together. Until we split up in the summer bc i just had enough of begging for help with our son when i shouldn’t. I met someone it was so short i just blew him off and he kept trying. So i gave him a shot. WELL, he is absolutely perfect. Treats my son perfect and same with me. My sons father found out and he wasn’t happy. So he changed and now he’s finally being a father and taking care of him with me but not as much still financially. I fell so madly in love with the guy that i met and now i’m stuck. I’m so hurt, i told him i couldn’t do it and just had to be friends and work it out with my sons father for him. Well now i’m so depressed, i’m so happy. I hate my sons father. We don’t get along because my son and simply me begging him couldn’t open up his eyes, another man did. I just don’t wanna be with him anymore but i’m doing itfor my son. My mom calls me selfish for it that i don’t wanna be with him.