Our Lord finds it extremely difficult (impossible actually) to deny his mother anything. This is due to the fact that she denied him nothing during his earthly life, and because of the deep love he has for her. The first miracle Jesus ever performed was at her request even though he initially had no intentions of doing it - “Woman, what does this have to do with me and with thee? My hour has not yet come.” This give’s Mary an omnipotence in the sense that she can obtain virtually anything she wants from her son. Evidence of this omnipotence can be found in Song of Solomon 6:10: “Who is she that cometh forth as the morning rising, fair as the moon, bright as the sun, terrible as an army set in array?” She is also called Mediatrix of Graces in that God has willed that all graces flow through her hands as she sees fit.
Therefore my advice to you is to cultivate a devotion to the Blessed Mother. Say the rosary DAILY and ask her for the grace to remain chaste. Get up early, light a candle and say it reverently on your knees. Don’t forget to meditate on the mysteries while you’re saying it - if your mind is on one thing, it can’t be on another if you know what I mean. The rosary is literally a weapon to be used against evil and vice. In fact, there is no type of evil that can’t be overcome by saying the rosary. In time, you will acquire the grace, the discipline, and the mental focus necessary to overcome this vice. So, pick up your weapon soldier!