Does God really exist? If yes, why can't we see God?

God can only be seen by the process of pure bhakti.

Krishna says:

"My dear Arjuna, only by undivided devotional service can I be understood as I am, standing before you, and can thus be seen directly. Only in this way can you enter into the mysteries of My understanding." (Bg. 11.54)

Modern people, especially atheists, have the erroneous idea that because God hasn’t revealed Himself to them, therefore He doesn’t exist.

What they don’t understand is that God doesn’t feel obliged to show Himself to people, who have no love for Him. God doesn’t care in the least whether we believe in Him or not.

God doesn’t need anything from us, He is totally independent and fully satisfied in Himself. Out of His infinite kindness towards the fallen soul, however, He allows us to enter into a loving relationship with Him.

Bhakti - the process of devotional service, is the only thing that can attract God to us. If a person is not willing to enter into the proces of bhakti, he will never see or feel God. Is that a problem for God? Nope. It’s entirely our problem if we are not willing to do what it takes to see God.

"This Supreme Self cannot be reached by argumentation, or by applying one's independent brain power, or by studying many scriptures. Rather, he alone can achieve the Self whom the Self chooses to favor. To that person the Self reveals His own true, personal form." --Mundaka Upanisad 3.2.3