How can you build mental discipline?

I feel like I have lost all discipline nowadays. Every time I sit down to study or work, without fail I end up on instagram or youtube wasting time. I feel like my lack of mental discipline is also what is making nofap so hard. I don't want to succeed bad enough. I know what i'm doing when I jack off and what its doing to my health, but I don't care enough to stop. Every day blurs into the next and I end up losing large amounts of time. Hours go by and I don't even remember what I was doing. I am constantly exhausted, yet can't sleep. I'm depressed and don't even feel like myself anymore.

I need help. I'm only 18 and live with my parents, but I am considering seeing an addiction psychologist in private or even moving out just to change up my lifestyle enough to get my footing and try to make some big changes. I know for certain that I can't live like this for much longer.

Does anyone have any advice? I need help, badly. Any and all comments are welcome

 

Thanks man for the response. I honestly am so ready to move out. The biggest issue right now is finances, to put it simply I can't afford an apartment or mortgage. I might start crunching the numbers and seeing if any of my buddies are also looking for a place. I think I could put up with roommates.

I kind of have been toying with the idea for a while but every day that passes it seems like a better idea