Can I be Agnostic and Catholic at the same time?

Recently I've gotten in touch with my true spiritual identity and contemplated if there is actually a God, and I had trouble settling on a straightforward yes or no. I've been raised to believe in God and I go to church every once in a while. I think Catholicism is all fine and good, I don't have anything against it, but I just don't know if I believe we'll ever know if there's a God or not until we die. As far as we know Jesus was an actual guy, and something about me is certain he caused miracles, so I definitely follow him and that makes me think that I still have some Catholicism left in my faith. But when it comes to God it gets a little sketchy. For all we know, he can exist, but it's not something for us humans to know. I feel kind of upset because if God does exist, I feel guilty saying that I'm doubtful about him. But when I pray, I try to talk to God and hope he's listening, but I feel like I'm talking to a wall because for all we know, no one can be listening. Once we die, we will know the truth, so as of now I don't think we're supposed to know, and no one ever will. I believe in evolution by the way, so I don't believe that God (if he exists) made Adam and Eve, however I do get the lesson of not to fall for temptation out of that Bible story. Not that that's how the earth was made. Do you see? I feel ashamed saying I don't know if there's a God but i really don't know. But as you can see I do follow parts of Christianity like Jesus. Can I be agnostic and Catholic??