Lets break apart a few common concerns about aging:
Your family leaving you alone. This is a big fear I hear from retired family. A sense that their children are too busy for them, that their grand-kids won't know them and that in the end they'll be alone. Building strong bonds with your children as they transition into adulthood will save you a lot of worry down the road. This means being present and mindful as a parent. Once your children have jobs, families and obligations of their own keep in touch and be helpful. Send a box subscription, mail the grand kids snacks or call and ask how their day is going. All these little things will help lessen worries of being left alone.
Do you fear being isolated and ignored as you age? One of the biggest pieces of advice I can give to both women and men is to cultivate relationships that will grow with you as you age. As a mom it can be imposable for me to get out and spend time with anyone that isn't my toddler. But I make a big effort to see my sisters, my brothers, a friend or two and my extended family regularly. When I can't see them I send emails and cards in the mail with photos and stories. Staying connected will make aging so much easier.
Aging isn't simple for us emotionally but it can be a wonderful thing to grow older and know what makes you happy. Do something every week that will make you happier in 10 years. Live an amazingly vivid life and don't let fear control how you age.