I was the favorite son/favorite child growing up, now I'm a fat loser because of it

As the title says, growing up I was the favorite son/favorite child of my single mom. I have one older brother who's a little under one year older than me that no longer speaks to my mother and I. My mother heavily favored me and made it clear I was her number one son. I literally never had to do any chores or work, while my brother had endless chores to do, and once he was old enough to get a job, my mom made him work around 25-30 hours a week at a grocery store and she also made him give all the money from his paycheck to me every week. I received presents a few times a week for "being the favorite", and my brother would have to stand there and watch me open my presents while our mother fawned over me, doted on me, praised me and smothered me with kisses. She even used to speak softly in my ear while kissing me things like "presents for mama's special favorite good boy". Growing up, I absolutely loved being the favorite. Now that I'm older, I feel suffocated under the weight of this favoritism as I still live with my mom and depend on her for everything, especially financially and materialistically. I've never had a job or was made to do any work so I have no skills other than what I learned in school. I am extremely, extremely overweight and have been since I was a Junior in high school because my mom is constantly giving me tons of delicious food and treats to eat. I know you might say just stop eating the treats and stop letting the favoritism happen, but in a way, I am addicted to being mom's favorite, but would like some advice and help as to how to break free. I can share more details if need be.