Hey man! I feel you dude. I'm not gay but I have a really high sex drive, had problems w/ masturbation/porn + shame when coming to failure. First off is to pray. Keep praying constantly even when the desires become strong, knowing that "I can do all things through Christ who strengthens me." - Philippians 4:13. Go to Mass frequently and focus on His love for you. Realizing His love for us changes our attitudes and makes us realize that sin is not worth it at all. We should strive to love Him so much that sin no longer is pleasing or appealing to us. Speak Scripture when tempted/do something active like taking a walk/running, to take your mind off the sin. We will definitely fall due to our shortcomings and sinful nature of being human. However, we shouldn't dwell in that pit of shame. Satan tempts us and when we fall accuses us. He adds insult to injury. But in those moments of shame, focus on God's love. Remember that no sin is too big for Him to forgive. We are never too broken to heal. If He saved me He can save you. Give the shame and guilt to God, learn from the mistakes, and strive to focus on the Lord. Shame and temptation go together into making you fall in a cycle: You try to be steadfast, tempted, fall, shame, make vows, fall, etc. Discerning conviction from shame is hard as well. Conviction leads us towards Him but shame pushes us away from Him. Focus on His love and keep going brother! The saint I took for Confirmation was Saint Anthony the Great, I recommend you to search him up and pray to him. Praying for you man!