How can I make my mom happy?

My mother too has diabetes, my best advice is to spend as much time as you can with her. I've learned just calling her everyday helps her and me. My mother married young had three children by the time she was 25. Then divorced my father because he cheated on her all the time. So us kids because her life. So I would spend as much time with her as you can, just call and tell her you love her, leave on your machine. Or just send a card saying something nice. Take her out to lunch. Just enjoy the time you have with her.