Andy, your doctor is the best person to consult about managing your blood pressure. But as for improving your confidence, I'd recommend starting a regular exercise program. Is there any type of physical activity you enjoy? If so, that might be a good place to start. Otherwise, you could begin by walking.
Of course, you should talk to your doctor before beginning any exercise program. But once you get moving, I think you'll find that you'll feel much better about yourself -- and exercise will help your blood pressure, too.
Best of luck to you.