The bottom line answer is to BELIEVE! Can this be proven? Absolutely! God gave us the Holy Bible, so that we can believe! Listen to these verses:
John 3:16 - For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.
John 3:36 - He that believeth on the Son hath everlasting life: and he that believeth not the Son shall not see life; but the wrath of God abideth on him.
John 6:47 - Verily, verily, I say unto you, He that believeth on me hath everlasting life.
believeth - (pisteuon) - Verb - to believe, entrust
We BELIEVE after God gives us FAITH!
Romans 10:17 - So then faith cometh by hearing, and hearing by the word of God.
faith - (pistis) - Noun - faith, belief, divine persuasion
After we are persuaded by God’s gift of faith, we can believe.
God LOVES YOU. Your real issue is not that you smoke, drink, cuss, eat too much, gossip, say things you should not, do not attend Church, and live like there is no God. The real issue is that you have not BELIEVED!