If you haven't already, you will lose someone you can't live without, and your heart will be badly broken, and you never completely get over the loss of a deeply beloved person. But this is also good news. The person lives forever, in your broken heart that doesn't seal back up. And you come through, and you learn to dance with the banged-up heart.
When a daughter loses a mother, the intervals between grief responses lengthen over time, but her longing never disappears. It always hovers at the edge of her awareness, ready to surface at any time, in any place, in the least expected ways. This isn't pathological. It's normal. It's why you find yourself, at twenty-four, or thirty-five or forty-three, unwrapping a present or walking down an aisle or crossing a busy street, doubled over and missing your mother.