You've tried a lot of things. Jesus is the only one who died for you and rose again. If you're ready to trust Him as your Savior, tell Him. No script. No special words. He already knows your heart, so just be honest.
Not sure where to start?
Tell Him the truth about where you've been.
Tell Him you're done running your own kingdom, and that you're sorry.
Thank Him for dying and rising again for you.
Ask Him to lead your life from here.
Out loud, in your car, at 3 a.m. However it comes out, He's listening.
If you trusted Him with your life today, the Bible says you're forgiven and you belong to God. Welcome to His kingdom.