I’ll go against the grain here… it’s very likely he existed. The majority of modern scholars would agree. Here’s a book about it if you’re interested: https://www.nytimes.com/2013/08/06/books/reza-aslans-zealot-the-life-and-times-of-jesus-of-nazareth.html
Full disclosure, I am a Catholic. I got my undergraduate degree in history and spent a year in a PhD program at the Catholic University of America. So of course, I am “biased.”
Although there is no way to prove he existed, the evidence is favorable that he did. Arguments against his existence focus mainly on doubt and put the burden of proof on his existence, which I can’t do. But I do think it’s very probable Jesus was a real person.
Whether or not Jesus is God, performed miracles, rose from the dead, etc. is of course where rationalization has to be suspended. Christians believe in it, non-Christians don’t. It’s a matter of faith.