Well, nope, feeling numb is not a good thing and I can speak out of experience. I felt numb-ish since I was around 16 till 22 and I can only recall memories when I talk and talk till piece by piece memories come back up. I compare it with depression. It kindaaa does the same to you but instead of feeling like crap, you push it away and feel nothing at all. And just like depression it isn't like anyone can help you to come out of it. Unfortunately.
Put goals for yourself, something to move forward to even if the steps you take are very, very small. Something to look forward to and to one day achieve. So that whenever you got a day where you feel lower than usual you just remind yourself of where you want to stand, someday.
If you feel like the emotions are bulking up but you cannot like.. how you say it? Live it, express them? Watch or do something which would get the emotions out of you anyway. In my case I felt in my stomach I was heaping up so many tears but I couldn't ever express them. Watching tear jerking movies/series did the trick. It sucks to feel hurt, but it is alright. It sucks even more not to feel hurt. It may sound very cheesy but if you never experienced what pain feels like then happiness is less appreciated, because you don't know otherwise.
I read so many stuff going on with you, your family, your situation. Whenever I see your posts pass by I feel bad for you. It must be tough .. I really hope things will improve for you soon. Just think of where you want to be at eventually and go for it, bits by bits ^^.