SammyAlice here is the best help that I/we can give.
First of all, maybe you haven't truly been born again by the spirit of God? (That's not judging you by the way, that's trying to help you.) There was sin in my life that I could not stop until I was born again.
Or if you have been born again, still the answer -- the first step -- is really the same:
Repent.
This was the message of Jesus, what he preached from the beginning. It's also the message of the whole Bible. Repent. That doesn't mean "stop" -- I understand sometimes we can't stop by our own power. But it means that you truly WANT to stop; it means that you're truly sorry in the sense that you absolutely don't want to continue that sin. (And then He'll clean you up -- guaranteed.)
When you truly repent, it should be done with entire faith in Jesus, and only Him, as the one and only saviour of the world, the Son of God who was given as a sacrifice for your sin, the one who took the punishment for you.
If you truly believe in Jesus, and truly repent of all your sin, then God will do two things:
#1 He'll forgive you for all your sin
#2 He'll change you -- and give you power over the sin (that's part of being "born again")
Anyway even if you've experienced God before but are backslidden, the answer is the same. Have true faith in Jesus and repent. He'll give you power over sexual sin. You may have temptation but you'll have the power to say no to it. It may also help to take practical steps to remove temptations. Part of your daily prayer should be "Lord lead us/me not into temptation". So you certainly shouldn't do anything to lead yourself into temptation. And Jesus said if something causes you to stumble, cut it out. If your hand causes you to fall into sin, cut it off. I think the application is obvious. No, not your genitals, but whatever online activities/sites/whatever you need to avoid in order to avoid temptation, if need be. Also you need to continue to seek Him daily and you definitely need encouragement and fellowship with other Christians around you (seek it out), as well as online (if you can be online without sinning and pulling others into sin).
I hope this helps.
And we do need assurance from you that you will not use our chat site to pull others into sin.