The more I see of threads like this, the more concerned I am becoming. Seems like some people are going into the word of God and never even getting the true message of it. Some seem to just want to argue over every word instead of learning the true messages in the Bible.
You can call him Jesus, Jesus Christ, Lord Jesus...etc. he knows your heart, and as long as you believe in him and are saved, then it's all good. Then you need to move on to learning the scripture and how to live according to it....We need to learn the message and apply it to our lives....
So here's a little message that we can study...
Romans 13:14
“But put ye on the Lord Jesus Christ, and make not provision for the flesh, to fulfil the lusts thereof.”
Instead of worrying about whether you can call him Jesus Christ or not (which clearly you can because it's in the scripture) it would be much more beneficial to study and learn the messages of the scriptures and apply it to your life.