Tim, I am deeply sorry to hear about your loss. I lost my Father 16 yrs ago and I also did not know how I was going to move forward. I did realize however that for me to stop living my life would not be something he would want. That's not why he worked so hard, loved me and raised me to try and give me a better life then his own.
Now as parent and Grandparent, I have become my Father and have tried to give back to my children and grandchildren the love and effort he gave me. I know when I go, my chldren and granchildren will miss me but for them to want to stop living life would break my heart. That is the last thing I'd want for them. I'd have to believe that your Mother would have wanted the same for you (to have a good life). That's what any loving parent wants for their children.
Think about the times she has supported you or pushed you through life, I'm sure none of that has changed. I know it's tough man but hang in there, pm me and I'll give you my cell if you need a friend to talk to.
Rick