If you can't afford to get a gym membership, try your local community center or YMCA. You can find great discounts and sometimes even barter with them for a membership. For example, offer to help clean the gym or work on the grounds. That's great exercise for a diabetic, too.
If you are a diabetic, it is crucial that you have your blood pressure checked regularly. Diabetes can increase the risk of developing high blood pressure, which can lead to serious health problems, like strokes. Try to buy a home blood pressure machine or go to a pharmacy to check it yourself.
Even if you feel like your diabetes has gotten better, it is important not to stop taking your medications unless a doctor tells you it is alright to do so. The medications are most likely what is keeping your diabetes symptoms under control, so without them, your glucose or insulin levels could get out of control.