i would add, some advice is good here. i must say i'm married, diksa intiated and still have lot of lust. I add some big masturbation habit some years ago, and it went away... i'm careful because you can always fall down and sometimes it happens. So alkaline food mostly, no erotic material like magazines and website, and yes, be careful if you stay in bed late... it's the time you are more vulnerable.
Anyway, keep on chanting and try not to worry so much if you fall down, tomorrow is another day and you can practice and turn to God. i understand it is very difficult if you are single, and i know i would probably still have this habit if i was single also. So find a serious relationship, and everything will be better. one wife, regulation and after 50-60, give it up !
there's a good book called the 4 principles of freedom by Satyaraj (steven rosen) which talk elaborately about this issue.