I think you should stick with the fnireds who you can trust and who will stand by you when you're going through a tough time. And if they try to approach you, you should let them know how you felt when they didn't make an effort to comfort you or give you any words of wisdom about coping with a loss.
Please accept my condolences on the loss of your mother. She sounded like a wonderful lady who loved life and loved her family. Hold tight to the wonderful memories that you have of her and of the times you've shared. These are the real treasures in life.