I think you have to go back to the beginning and start afresh with a clear mind. Read what you can on Jesus and most of all read the New Testament.
There is no doubt that Jesus as a man existed. There is no doubt that his words were very very wise - I read the New Testament time and again and he always seems ready with an answer for everything! He astounds the teachers and did do from a young age - there is no doubt at all that he is truly a remarkable man.
What you have to remember is that he was born a Carpenter's son, he would not have had a formal education as he would be expected to follow his father into carpentry. So how did he learn to read and write? Where did his extraordinary knowledge of the Scriptures come from?
Then there are his claims, as absurd as they would have sounded back then. The Jews were waiting for their Messiah, but they were waiting on a warrior figure who would led a revolution against the Romans. Yet Jesus was the opposite, his message was peace not war. He knew the risks he took, he didn't set out for fame or glory - so why did he do it? Why did he preach his message knowing that the Jews would react against him, knowing that his life would be in danger? What was in it for him? Was he deluded? His teachings certainly don't sound deluded, they sound intelligent, well reasoned and credible.
Then there are his friends, the apostles. What did they gain by all of this? Once Jesus had been crucified they could have left it at that, preached about him for a while and then disappeared. But they didn't, they were adament that he rose again. They put their lives at stake once more by preaching his resurrection. Not one of them took back his account, not even when being killed did they denounce Jesus.
To me, this is enough reasoned argument to prove that Jesus was someone very very different. I find no grounds to disbelieve his claims or those of his disciples. Also, and this is the big bit I suppose, where faith comes into play, I believe in my heart that he was who he said he was.