Hey 5770,
When you're alone and feel tempted to act out, remember that you'll be destroying yourself and taking yourself further away from what we all really want in life.
My advice is go to the gym and work off all the urges in a healthy way. You'll actually spend less time working out than you could have indulging in porn and then feeling completely rough after you've fallen.
Hope that helps and have a great weekend,
DL