Be passionate but practical
Check out this post from Allison Tait about fitting writing into a busy life http://allisontait.com/2015/01/be-passionate-but-be-practical/
I also have a family and a job but I really, really want to be a writer! Fortunately, I have made the commitment and 'find' the time to fit it in. Yes, that might mean I miss out on some relaxation and tv time but at least I appreciate it when it does happen.
We all have the same 24 hours in the day, some people just use them more productively than others.
Happy writing everyone :)