I'm struggling with God...

I don't know what to do about things in my life and I find myself turning away from God, and rebelling. I know the right things to do, but my heart is so lonely that I want to reach out and find someone to need me as I feel the want to be needed in life. I think it's the presence of the ones I love I need the most and can't have, I feel lost without my children and husband. I somehow live the motions of life yet my heart feels broken, and I just refuse to turn to God for that Love and guidance. I want what is best for me and my family, but how can I ever do that if I can't find what is right in me. Is there anyone out there who can give me some advise on what to do. I fill my time with work, and running, and blogging, yet I still feel emptiness.What do I do and how do I find comfort in the Lord again?