The worst thing is growing up and seeing them less and less to the point where once you do end up seeing them, they look WAY older than your mental image of them. Cherish your parents while you have them
My mom will be 89 in a couple of months and it's so hard to watch her get so frail when her mind is still so sharp. I recently started recording her stories, like how she became a Univac programmer in the 60's. I cherish every minute because I hear the clock ticking and it's SO loud and never goes away. I'm going to miss my mom so much. It's like my heart's already breaking under the weight of losing her.