Bbw question

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I’m very insecure about my body i weight 200 lbs 😞😭 my bf bday is coming up i want to wear something sexy but i have this really big stomach and like no ass, but i dont know what to do!! Its hard like realy hard for me to lose weight do to healt conditions that i have. What do you ladys think i should do? Should i even wear a sexy lingerie 😒😒?? Any advice no offense to nobody this weight in just speaking for myself!! Any ideas 💡 please