“I suppose that according to you I cannot have communion with God?”
Strawman. Of course you CAN.
“That I cannot have a relationship with Jesus because I do not follow your doctrine?”
If you deny Our Lord, well how can you have a relationship with Him?
How do I deny our Lord? Please explain how believing that the Last Supper was to be symbolic means I am denying Christ.
For if you do that, then I charge you deny to even pray as our Lord directed, in that you refuse to say the entire Lord's Prayer, omitting the ending that only the mass celebrant recites. Does that mean your prayers are empty and denying of Christ?
In fact, I will claim that you do a dishonor to the Last Supper because you do not wipe the threshold with fresh lamb's blood as required to remember and faithfully reproduct the Last Supper (Passover).
Are you so sure of your doctrine that you will second guess the words of Christ himself when He states it is by faith that we are saved, it is not by actions? Do you place your doctrine above the words of God?