All Christians are baptized. I understand some sects claim that isn't true. All baptized people are part of the Body of Christ. All from the Church perspective are part of the flock even if they refuse to recognize that fact.
Christians in union with Rome, are Catholics. There are Catholics that are not in union with Rome, and they are called various names, but are excluded from Communion.
Only Catholics who are in good standing with the Church, following the requirements, may take Communion, all others are denied this privilege.
This is not difficult, if you are baptized you are part of Christs flock. The Church considers you one of its own from that point forward.
Its also why its a sure indicator that people are being stupid by saying "Catholic Christian". its like saying I am a "Human Mammal"
Really??? Even if you never repented??? Even if you have never ask Jesus to be your Savior??? Even if you don't really believe Jesus is the 'real' Son of God??? Just as long as you got baptized???
Even if you got baptized because the rest of your family or friends got baptized???
I got Good News for ya...That may very well get you into the Catholic Church but it WILL NOT get you into the Body of Jesus Christ...
You have been deceived...But there is a way to get there...And it's very simple...
Act 2:21 And it shall come to pass, that whosoever shall call on the name of the Lord shall be saved.
Precisely. And even then, you can still be damned. Dante littered Hell with Catholics--bishops and Popes even.