I am very sorry to hear about your Mom, you must have been very close with her to be feeling so bad, i am so sorry. It sounds like you havn't gotten over your loss of your mother yet. And, yes, i think these things you are doing are somewhat making matters worse. They are fine things to do, but in my personal opinion, i feel that you must first work through and accept your loss. It is a big thing in life, and sometimes we need to face our biggest downers head on in order to move on. Have you seen a therapist about your loss?
Just a side note, my best friend in college recently lost his father. He was a really confident, social, basically perfect guy(a little bit of a pushover though) to begin with, but after the loss of his father, he became even more of these qualities. He viewed his loss as the worst thing in the world, and he was so close to his father. But after he died, he basically had the attitude, "i don't care what i do or say or act like to anyone, people seem to like me the way i am right now, so refuse to hold back anymore...why should i, i didn't deserve to have my father die, so why should i hold back anything i want in life."