Naming baby boy...

When my boyfriend and I started planning to have a baby we had always said if it were a boy we would name him after him.  His name is Klaus, it's a family name... since the moment I've conceived we have done nothing but fight.  He has become very secretive and sneaky... he won't move in, he lives an hour away (I already know why plan a baby when things are like this but they weren't before I conceived).  Well I have now decided I don't want the baby to have his name, he isn't very happy... but I feel like he isn't going to be involved I just have that feeling in my heart... how can I name my baby after a dad that isn't going to be involved?  Any thoughts?