What do i do?

Ok after relapsing again i need some help so i'll try and keep this short.

Instead of writing out a story i'll just add cliffs:

20 and no girlfriend
small town with no legal age girls
nothing to do literally in said town
sore knee so can't go run when urges hit
can't drive (theory booked for 25th November)
Hardly any friends because of small town
when urges hit they hit HARD
No release for said urges

So how the hell do i do this without continually relapsing maybe a week or two down the line? i Really want to do this but with no sexual release it's stupidly hard, hardest thing i've ever done.

please help.