Rejection of faith, at some point in life, is, so I believe, a very good thing. Even if you risk losing it never to gain it again, I that taking that step beyond whatever faith you were raised in or have converted to can help you to develop as a person.
For me personally, rejecting Christianity was difficult as I faced external familial pressure and internal pressure that built up over the fact that I was raised a Christian. But over time I realized that I can't pretend to believe in something I think is false and ultimately rejected it.
Funnily enough, I don't even care about true or false anymore. Even though I believe my beliefs are accurate, whether they are true or false is irrelevant to me because I see religion as a system for personal development. We all develop differently, so why wouldn't religious practice differ? And if I expect practices to differ how can I even refer to a religion as true or false? I think beneficial is a better way of looking at it.
Religious practice/belief can be beneficial or harmful for a person. And a person should be cognizant of whether or not their practice/belief is beneficial or harmful to themselves. In this case I would say that harmful includes stagnation. If you look at your religious faith, in your case Catholicism, and you find that you simply cannot or don't believe it and you don't find the practices beneficial, then it makes sense to change your practice and/or beliefs.
Either way, I hope your journey goes well as you continue on in it.
