I dont have any motivation to work out anymore. I need help. Please?

I know I move around a lot but I haven't workout exactly for 3 weeks. I feel like I'm getting bigger. I list weight before and got thin but some of my relatives think I look better thicker and I'm a "tall girl". So? There's tall thin girls and they don't say nothing to them but with me they say I look better thicker. I walk and take the bus to school. I need help. I'm 6'1, 234lbs and large built.