Need relationship advice

I've been in a relationship now with my boyfriend for three months. He is very lovely, very kind, very empathic, but right now I've been having doubts and I feel terrible for it. We met on a spiritual dating site but since then my views have changed and I am sort of leaning atheist. I haven't told him but I will but I don't think he agrees with atheism (going off previous conversations)... Plus there are other things, like my entire world view and values and such are changing and I keep wondering about our compatibility... I am a bit confused about how to relate to this relationship right now and we haven't really had time to talk about it or text. He is always so busy with work (he's a school teacher). I want to marry him but I want to know from other married couples here can changing your values/worldviews from your partner still allow you to have a great relationship and become closer through the diversity or does it not usually work out? Thing with me is I change so much that I imagine even if I went out with someone else I'd probably be completely different after another three months and I don't want a cycle of it.. I just want to be with one person and I chose my boyfriend but I want encouragement that it will all be okay, since we are both very open minded and compassionate people. I am probably worrying about it just because we haven't actually had time to talk about it and mull things over and come to a truce. I was going to mention something today when I saw him but then he just phoned saying he is so overloaded from work we can't meet till tomorrow. We only see each other once a week and all the while I am stewing in my own anxieties about all this. I guess I really just want to feel like he will accept me now that I've changed... Is it normal to change your personality through the course of a long term relationship and can it be worked through? Thank you.

***Update: I texted him it and he said he doesn't mind what I believe. I am so relieved, but also still feeling pretty emotional, and I had the implant taken out yesterday so I'm wondering if the hormone changes are making everything seem so much worse than it actually is.