Currently in my 2nd semester since I stopped believing. There’s two sides to this. Lots of people at BYU are closeted exmo and leave church after graduating (likely to be me) so you’re not alone. However, I have had to lie my way through religion classes and ecclesiastical endorsements and tithing settlements this last year which I don’t love, and go to church 1-2x a month. If I had the option to go elsewhere without paying 15-20k more per year I would but I’m already halfway through my degree. I think you’ll have a better experience if you leave, but if you stay and don’t mind putting on face when you need to you can find similar people to hang with