Christianity is indeed the Catholic Church....has been for 2,013 years (longer actually) If you are a Christian, and I assume that you are, you are an incomplete Christian by not enjoying what is the fullness of Catholicism. Don't just ignore what I'm telling you, check it out for yourself, find out what the miracle of the Eucharist is....an actual reception of the literal Body and Blood of our lord.....nothing in Christianity is more fulfilling than that....NOTHING!!!
I am sure the Eastern Churches would see it somewhat differently...