Jesus himself commends those who believe in the one God (Yahweh) and asks his hearers to also believe in him (Jesus).
You don’t believe in him because you don’t believe he is real? You’re going to find out - live and in person - that he is, when you are resurrected from the grave.
In the meantime, you’re left doubting the existence of a person who is vouched for by the apostles, and others.
Do you doubt the existence of other historical figures whom you’ve not seen with your own eyes?
P.S.
How do the historical sources for Jesus compare with Tiberius Caesar, the most powerful man alive in his day? Sean offers a comparison between the two.
seanmcdowell.org