Jesus

"Why do you follow Catholicism?"

Its the way, its the truth.

"But why do you follow it so? What is truth but a fact? and this cannot be proven."

The fact of the matter is that Jesus is Truth.  Some things cannot be proven without evidence, this is where faith comes in. Those who have faith will need no explaination and those who has none, no explaination will do. The absence of evidence is not the evidence of absence

"Catholicism teaches stuff from the Bible, and the Bible is a bunch of lies" (forgive me God for saying that x.x)

Because..well..I am too lazy to explain the theatrics, but know this, Man is only so smart that he must be explained to through the uses of symbolism, metaphors, and lessons. Tell me, if an angel really existed, or some supernatural being really did existed (which it does) will it be smarter and stronger than man? Most Probably.

Anyway  the main point is the idea of love and sacrifice. God is the only one that loves you beyond anything else. Who else would do it? Jesus so loved mankind that he gave his life for all of us. Now the question is..would you give up your life for a person you love? or persons you love? or for a random homeless stranger? Now now before anyone starts anything, I hope you see that most of the time we care only for ourselves and our loved ones. Jesus is the only man that can do this 100% without fail or hesitation. He did it once, and he changed the world. You do it once, and you probably will too.