FrostNiteShayde
.thou.shalt.not.strayeth.
I don't worship Catholism, but I do consider myself a Catholic. I am a follower of Paganism, and I worship the Goddess. But alas I can't seem to let go of my Catholic background.
xxFrostyxx
There are some ways you can compromise both, you know. I'm not trying to convert you or anything, I'm just trying to perhaps point you in the direction of a religion that shares common beliefs with you.
Off the top of my head, I know of two very direct ways.
1) Christian Wicca (there is also a Catholic Wicca varient)
Christian Wicca combines Christian and Wiccan beliefs. Common elements transplanted from Wicca include reincarnation and fertility; however, the key points of the divinity of Jehovah, Christ, and the Holy Spirit are retained from Christianity, often with a renewed emphasis on the latter two.
Simply put, it's the Christian hierarchy (God, Christ, Angels, Demons, etc.) with Wiccan practices. A bit more complex than that, but that's the easiest way to put it.
2) Vodoun
Also known as Vodou, Voodoo, or Vudu, this is an actual religion. It has nothing to do with little pin-pricked dolls or zombies, contrary to what the media will tell you.
Vodoun is a fairly old religion of the modern era, developing its first roots about 500 years ago. The religion was, quite literally, a blend of French Catholicism and West African ancestral paganism. It was developed by african slaves taken by French traders to the Carribbean (where it is still practiced today; it is widely practiced in Haiti, as well as in many Carribbean islands and the deep south).
The primary belief is that the Abrahamic God (YHWH, Jehova, Allah, whatever), known as Bondeye (coming from the French "Good God") is something of a "God of Gods". It is the supreme creator, who has gone on to create other Gods/Angels/"Mysteries" (known as Loa, who are divided into families and family roles; the Loa are based on, and commonly named after, Pagan Gods and Catholic Saints) to do his bidding. The religion believes that all people have their own mystic spirit, and can call for guidance from their ancestor's spirits. The religion also believes that you can call for help or forgiveness from the Loa, typically through respect, faith, and some rituals/acts.