cannot get rid of this addiction.

Hey, I had a problem with masturbation for a long time and it seems really difficult. Fortunately for me, I'm not addicted to porn. I started masturbating at age 17 and have been masturbating for 2 and a half years(I'm now 20). the longest I've not masturbated was for one month back in 2017. I've found this site in October and read all the thread about other people's problems, solutions and tried the challenges in the other forums. I've succeeded in the 7 day challenge but the 14 day challenge has been a pain in the arse. I've attempted it 4 times and I've failed in all of them, and when i read the threads about other people's problems, it's hard for me to relate. can anyone give me an advice on how to overcome this or what i should do when the urges start to return?

 

I failed at day 10. Then day 8 and then day 7. Can't remember the 4th time.