How to handle partner not wanting his second child (not sure which group to post in)

So, back story, i got pregnant on birth control when my daughter was 8 months old. The father wanted me to abort and i almost did, however i personally knew i couldnt live with myself. However he did end up saying he would support me either way. Now that baby is a month old he wants and hasnt wanted nothing to do with him. He says "well i never wanted him to begin with.." He gives all of his attention to my 18 MO. only holds the baby when i literally make him. And has even admit ted to not loving him. Help? What do i do? How should i go about this? Should i leave?