The same way you believe in anything else. You look at the evidence and set your mind accordingly.
Quoting Anonymous: Because I don't understand how you pray to something that you can't see
Why would you care what another person chooses to believe?
Well, if it would help you make a better decision one whether or not you want to believe in him, maybe you should got talk to a pastor? He could answer any and all questions you have!
Then you can make a decision after that.
And the same goes for any other religion you may be questioning. Find someone who has invested their life into it, and get answers!
Quoting Anonymous: Im still all confused if he exists or not