Single parenting..

The father of my unborn baby doesn't want her/him which is whatever. Problem is, I absolutely love his family and I want them to be a big part in baby's life, but he still lives at home so if I took baby there I'd have to deal with him and his crap about how this baby will just ruin everyone's lives. How do I make it so that they can be involved without involving him? To clarify, he still lives at home because he's 18 and I'm 16.