This is what you need to be like:
‘“It is not,” says St. Francis de Sales, “the seeing of objects so much as the fixing of our eyes upon them that proves most pernicious.” “If,” says St. Augustine, “our eyes should by chance fall upon others, let us take care never to fix them upon any one.” Father Manareo, when taking leave of St. Ignatius for a distant place, looked steadfastly in his face: for this look he was corrected by the saint. . . I do not see how looks at young persons of a different sex can be excused from the guilt of a venial fault, or even from mortal sin, when there is proximate danger of criminal consent. “It is not lawful,” says St. Gregory, “to behold what it is not lawful to covet.” The evil thought that proceeds from looks, though it should be rejected, never fails to leave a stain upon the soul. Brother Roger, a Franciscan of singular purity, being once asked why he was so reserved in his intercourse with women, replied, that when men avoid the occasions of sin, God preserves them; but when they expose themselves to danger, they are justly abandoned by the Lord, and easily fall into some grievous transgressions.’
St. Alphonsus Maria de Liguori
You must consider all such occasions and attractions poison, to compensate and correct for concupiscence and the habits that have been built up due to it. You need to build up habitual antipathy and opposite reaction.*
‘A person sins by complacency, when he does not desire to commit the sinful act, but delights in it as if he had committed it. This complacency is called morose delectation. It is called morose, not because the complacency in the thought of the unchaste acts lasts for a considerable time, but because the will dwells with delight on the thought. Hence the sin of complacency may, as St. Thomas teaches, be committed in a moment. “It is called morose,” says the holy Doctor, “not be cause one fakes pleasure for some time in the impure act, but because the will is resolved to dwell on the thought which it should reject at once.” he says “libenter” (" with pleasure") to remove scruples from persons of timorous conscience, who suffer against their will certain carnal motions and delights, although they do all in their power to banish them. Though the inferior part should feel a certain delight, as long as the will does not consent, there is no sin, at least no mortal sin.’
St. Alphonsus Maria de Liguori
‘To abstain from sinful actions is not sufficient for the fulfillment of God’s law. The very desire of what is forbidden is evil.’
St. John Baptist de la Salle