No. To be a Catholic, a person must be a member of the Church that was founded by Christ himself and governed in his name by his vicar, the Pope, and the bishops in union with the Pope. To be Catholic is not merely something you “practice,” as if using Catholic sacramentals and hanging around Catholic parishes and (mostly) believing what Catholics believe in itself makes you a Catholic. To be a Catholic is something you are by virtue of membership in the Catholic Church. There are certain non-Catholic groups, such as Anglicans, Old Catholics, etc., who like the name “Catholic” and have appropriated it for themselves, but that no more makes them true Catholics than does mere “practice” without membership in the Catholic Church.
Bottom line: If you want to be Catholic, then you must actually be a Catholic. Anything less is a form of self-deception.
