Tell me do you have any friends or colleagues who are especially noteworthy for their goodness or - dare we say it - saintliness? Have you ever spoken highly of such a person to others and praise them for their good qualities? Have you recommended such persons as examples for others to emulate? If so, you are really doing not much more than the Church is doing in that it establishes role models for Catholics to follow and to aspire to. Certainly there are those who are saints but who are not cannonized. There is nothing in Church teaching that states that cannonization creates a definitive list of the worthy. So you may indeed be a saint in the eyes of God.
Ah, but being a saint in Catholocism means so much more. Note how saints can be prayed to in Catholocism. Someone who merely appoints noteworthy people as excellent role models is not encouraging that level of admiration. So, the previous poster is "not doing much more", but is rather doing much less--as it should be.
I'm just a run-of-the-mill sinner, but I think one of the qualities of saints is their humility. Dunno how well saying, "I'm a saint" squares with that!