i really feel like she's the one.
No you don't, you're infatuated. You haven't even had sex with her yet. You may be incompatible sexually. However, if you keep going down this path with her, you probably won't find out if she is sexually compatible until it's too late.
she's a great person and i don't have anything against Jw's but i don't agree with some of there beliefs.
This alone says that she ISN'T "The One". If you want someone who is compatible with you, you shouldn't have any huge beefs with parts of their personality. However, JWs have their entire religion as their personality. If you don't agree with her beliefs, how are you going to get along with her when these beliefs are part of her personality?
Also, you cannot change another person. They have to change themselves.
There's thousands of women out there, and I guarantee there is someone out there much more compatible for you. Her "beliefs" are going to cause a lot of conflict between the two of you. Obviously, you're having conflict now or else you wouldn't be here.