Leave her so you can both find people that youre more suited for.
Good luck to you and your family with the rest of fellowship. Make sure the girl you like is already 16 years old.
I am struggling to find an answer to this question for several reasons. I decided that if the church taught the general principle that couples should be married in the temple and that was not possible for me if I married this girlthen I should see if my choice would be an exception to the rule.
In some cases you can just simply live together with differing religions.