Hi unsure,
i don't know that there is much debate over whether or not a man named Jesus of Nazareth actually existed, despite the little recorded evidence outside the Bible that was already mentioned on other threads. It seems the debate is more over whether he was just a regular man or the actual Son of God on earth.
May I ask why your faith is so dependent on whether or not this man actually existed? Why not consider the fact that there was clearly a huge shift in the first century where hundreds of thousands and even up to millions of people were willing to die and be persecuted over a minority faith both within the realm of Judaism and the Roman Empire. For such a shift in consciousness to have occurred so suddenly within one generation would suggest something real took place.
You can debate whether or not this thing has any real meaning or significance to you or humanity but I think it's pretty evident that something real actually did happen.
I don't know if this will mean anything for you. I really hate to see people lose faith. So much of faith is equated to religion and authoritarianism when it should be more about your individual personal journey through life with God.