Hi SoSelfish?, no you are absolutely NOT selfish!!
And massive kudos to you for getting out of there!!
Nothing is worth putting up with that for...........you know the emotional impact on yourself, you know that it/the situation was only likely to get worse, you know that your children would be/start picking up on it, you know the short and long term damage it could do to them by you staying/not leaving as you have, right?? So you have made absolutely the right decision!!
I've found some links which hopefully might be able to help you in the emotional and practical difficulties you may be having, if you could check them out:
SOM - Domestic Violence
DHS - Domestic Violence
YWCA West Central Michigan : Domestic Violence : Services
Sorry if some contact overlap.
But you're right, you need to stay strong, and we can be here to support you with that too.

Alison