Thanks for all you replies.
DKVV - I don't think I fear death, I am intruiged by it more than anything. I often wonder about any afterlife there may be. I have a family, but I am the youngest.
Alexander - I think that is true to a certain extent. People who think "I'm to old to do that" often end up not having as much fun and become "old before their time" - pottering around and not taking risks. However, it is true that animals age without any social pressures.
Mintola - thanks for the advice. You are right. I just worry that I won't be attractive to my partner anymore.
Gomen - that's great advice. I only do a small amount of exercise. You are right in that if I look after myself, my body will feel and look better regardless of age. I think my concerns are mainly cosmetic, which does show insecurity on my part. Our culture attaches so much importance to looking young and beautiful, it's hard not to feel worthless if you are ugly and old. I guess I should be looking more inside myself and valuing what's there.
Jurplesman - thanks, I'll take the test.
Eyebrows - thanks for the great advice. Changing little things will give me more confidence so I can face the world! I appreciate it