Hi girls i really need your advise iam completly desperate

Well every year i said i gonna lose weight this time but i not commited yet for exqmple i go on a diet like for a month then i have this desire to eat fast food like i don't what to do when i give up on my tenptqtions i feel really guilty about what i eat and then decide to quit the diet and just eat whatever

Anyway the same for sport i feel so lazy

I've suffering from.obesity since i was child and i get bullied because of it i watched a dozens of vlog and i read a lot od subject about that but still no hope now

Any ideas any advises

Ps i still live with parents