does anyone else think they'll never lose weight?

i dont know if im the only one that struggles with this, but i have this feelings i'm not gonna lose weight even by fasting and doing everything right. For reference, i'm an obese person. Ive tried a lot of ways to lose weight but nothing ever worked. I am now trying fasting and keto and i really hope it will work. Does anyone else deal with this? any words of motivation for me?