I am truly sorry for your difficulties, and I pray for the healing and forgiveness of sins of your grandmother. It is tragic how many college students lose their faith in college. It seems to be the single greatest trap for irreligion in the modern world. There are many possible reasons for this, but one of the biggest is that when people enter college, they expect everything to go perfectly for them from then on, that having a college education will give them complete security in life. And, when that expectation fails, they lose faith in God as if He had guaranteed their expectations to come true. They begin to think that life is hopeless, that things are accomplished by one’s own effort alone. They forget that God is the most important thing in life and the one and only source of goodness, meaning and eternal life.
Our pain, difficulties and expectations are all temporary, short-lived. God alone is eternal. And, how did He accomplish our salvation? By terrible suffering, persecution and death. Our own salvation is accomplished by those same means. Christ did not suffer and die so that our lives in this world could be painless and prosperous. He did so to show us what we must do to be saved - we must be completely and utterly devoted to God and to mankind, out of faith, hope and love, willing to suffering anything that Satan and this fallen world throw at us to deter us from that purpose. We are soldiers for Christ, fighting to save ourselves and our brethren from the clutches of Satan and his sin-poison.
If you ever have any questions or issues you would like to discuss privately, please feel free to PM me.

I fervently pray that you may return to Christ and His Church, that you may experience a new conversion and be forgiven of all your sins, to be inflamed with the love of Christ. I pray that you may be healed of all your afflictions, protected from all other problems, and find new love in romance. I extend these prayers to all college students, current and former, in the world, and all those who have lost their faith. I ask for the intercession of the Blessed Virgin Mary, your guardian angel, and St. Albert the Great, patron saint of students. God bless.
Eternal Father, I offer Thee the Most Precious Blood of Thy Divine Son, Jesus, in union with the Masses said throughout the world today, for all the holy souls in Purgatory, for sinners everywhere, for sinners in the universal Church, for those in my own home and within my family. Amen.