Age alone is never a contraindication to surgery even breast reduction surgery. Whether or not you should undergo breast reduction surgery is more a matter of your general health. If you are other wise healthy and do not have significant comorbidities (other health issues) you should consider it especially if you've come to the conclusion that your breast size has detracted from you ability to enjoy life to the fullest. However, it is imperative that you discuss this with your primary physician and he is in agreement.
Your age is not a contraindication to having breast reduction surgery. Your overall medical health is the most important factor, and you will likely need to be medically cleared by your primary care physician and/or a cardiologist prior to proceeding with surgery. Best wishes.