I am 13 years old and I think of sex I try everything to fight it, but I can't I imagine naked women, although I try to never look at nude pictures. Even when I have a bath I act like I am having sex with a woman which I can imagine. Please tell me a solution to this nightmare. My friends and I keep saying you can pray before its time. Is it true?

Praise be to Allah, the Lord of the World; and may His blessings and peace be upon our Prophet Muhammad and upon all his Family and Companions.

Dear inquirer!
Know - may Allah grant success to all of us - that a man will be held responsible for his life, how he spent it, and for his youth as to how he consumed it. Disobedience may lead to commit more and more evil deeds. So, you have to fear Allah in secret and in public, since everything in this life is in Allah's Hand and under His Order. He is The Granter of bounties and The One who can dispossess them. You must be thankful for His Blessings on you, fear His Punishment and Wrath. We advise you to keep company with those who can help you to be obedient; those who remind you of Allah and the Hereafter. You are to make your time busy with reading the Qur'an and beneficial books as well as listening to effective recorded materials.
Our brother!
You are to look down upon trivial matters and to be active and dynamic. It is beneficial to spend your time in thinking and contemplation about the lives of the Prophet's (Sallallahu Alaihi wa Sallam) companions and followers, who lived Islam as Mujahideen, raising the banner of Islam in different countries and doing their best to establish its rulings and pillars.
You are advised to lower your gaze and avoid that while arouses lusts or draws your mind and thought towards prohibitions.
For more details, please read Fatwa: 81167.
As for performing prayers before the fixed time, please read Fatwa:82907.
Allah knows best.