Advice please

I'm 21 and 14 weeks pregnant, my boyfriend when we planned the baby said he'd stay and be supportive, but recently he's been more distant, has no money management skills (can never afford to come see me and failed to come to a midwife appointment he agreed to come to) at what point would you say enough is enough... I'm not sure how much more I can take, think I only let him off so much is for the child's benefit so they will have both parents :/