As a Catholic myself, yes, i do believe in God. I may not see him physically but i definitely can feel him through His actions. Through his actions, i can feel Him by the trials He is giving me. With those trials, He is showing me how to deal, conquer, live, love and learn from life.
Without GOD there can't be anything. I am a Catholic and I believe HIM a lot, HE is the one who gave me life, teaches how to live, strengthen me while I was surrounded by difficulties and walks with me wherever I go. I feel HIS presence in everything.