I have a problem?

i guess im not really going to lose weight. :( ive tried everything. since feb22. i try to lose 30 pounds. i lose 10 pounds in 2 weeks, and gain it all back in 3 days. and trying makes me feel depressed bec i know failure will come. :( is it time to give up everything. ? i just can;t take it anymore. thinking about my size and food ever single day. i CANT ENJOy LIFE! i wish i never started to think about weight. :( i want my life when i dont know about dieting. :( i dont know want to eat because my mind is polluted with fad diets. REALLY! i've tried everything. and i end up munching. LOL. i hate it. i just keep on losing my battle with foods. :(