My Mom was 88 when she passed, my Dad had just turned 90, that was 4 years ago. Even though there had been miles between us, there was always comfort in their being there. Now I am constantly aware that there are "none before me", and that family memories have become my responsibility. Allow yourself to grieve, and then, begin taking joy in keeping her memory alive and well. May your faith be strong, and the healing complete.
Pete