I NEED to lose weight! Please help!!?

This sounds so typical, but for my health i need to lose weight. Not only for that but for my emotional health too. I have Pulmonary Arterial Hypertension, so working out is very difficult for my breathing. My body cannot keep up like a regular person, and my heart and lungs get stressed easily. Running and things like that are out of the question, especially while im going through treatment. Im only about 5' 2" maybe 5'3", and im about 148. I really want to be closer to 125. I need some fat burning and weight loss methods for my stomach region, love handles, arms and legs. PLEASE HELP. This has been a struggle for a very long time.