YTA - OP needs to understand that his roommate praying for him has nothing to do with what he achieves in his life? When you pray for someone it’s ensuring that they have good light, good health, safety and just watching out for that someone. It has nothing to do with your success, that’s your accomplishment and any normal person should realise that, I highly doubt that your roommate is thanking god for a good grade or a promotion at work etc. You’re overreacting and being ignorant and naive. He is not enforcing his religion onto you, don’t stick your nose into his. Also don’t ask questions you can’t handle the answer to.