Yes, sometimes it feels like this. But do not, ever, pay attention to this feeling–it is so detrimental, and it comes from Satan. Do not give up! Remember that you will go to Hell only for mortal sins for which you have not repented–if you are truly sorry for your sin and intend to go to confession as soon as possible, you are forgiven.
Throw yourself at Jesus’ feet, tell Him you hate your sin and you realize your misery, and tell Him again and again that you trust completely in His mercy, though you do not deserve it. Beg Him to give you deep sorrow for what you have done and promise Him that you will go to confession as soon as possible so that you can again become His faithful friend. Imagine yourself watching Him being scourged or crowned with thorns, the soldiers slapping and spitting on Him; or seeing Him reach out lovingly, all battered and bloody, to receive the cross you deserved to bear; or picture yourself kneeling at the cross, and looking at the nail driven brutally through the feet that walked the earth to bring you salvation. Imagine anything that will deepen your hatred and disgust for sin. Go to Mary, who was hurt just as much as Jesus by your sin, and beg her to prevent you from ever causing her and her beloved Son so much pain again. She will never fail you; she is the surest way back to Jesus. Ask her to give you deep, true sorrow. Think about the fact that by your sin, you have made yourself deserving of the total deprivation of God’s love, Hell itself. Tell Jesus that you realize this, and that you desire for Him to lift you out of your misery so that you can love and serve Him again. Pray Psalm 51 as many times as you need to.
k8e308, do not stop trying! Do not give up! God loves you deeply, and is yearning for you to turn to Him in love and repentance. He is waiting eagerly to give you His mercy. Do not stop caring, because God still cares; He still loves you.
I will be praying for you.