Weight Loss but how long?

okay im 18 years old and weigh 220 pounds. i used to weigh about 170 two years ago and i had ALOT of girls notice me and i had in general alot more friends. that could have also been bacuase of high school too but thats not the point. ever since ive gained so much weight i havent been remotely close to as confident as i used to be. i have had my girlsfriend for about a little over 2 tyears now and i can just tell that she doesnt look at me with that wow look anymore. i have tried diets and everything and it just doesnt work. i work 40 hours a week and go to college full time. my scheldule is so tight i just dont have any time to go to the gym or work out. and on my days off im so exhausted from work (construction) that i just sit around all day and recouperate. i remember i used to be a real chubby kid ealry in school then i lost like 70 pounds in one year but that also came with not eating and being afraid to eat for fear of any slight weight gain. i know its not healthy but it really worked and i didnt feel any difference. i would still eat dinner or something small but most of food for the day was totally cut out. ive tried to do that but now its so incredibly hard. im addicted to food. i just dont know what to do, i want my girlfriend to lok at me like she used to. i want her friends to say "your boyfriend is really cute" like they used to . honestly i just wish i could go back in time and just not eat all of what i did to gain this weight cause i dont have the time to lose it. anyone have some advice?.