It depends on each person being able to be happy for the other person having beliefs that work for them and not desiring to change the other person.
It's not going to work if one person is stressed out that the other person is sucked in/believes nonsense. And it's not going to work if one person is stressed out that the other person is going to hell.
More fraught issues come up if you have children.
Pretty much ends the thread right there.
For the record when I came to faith I by choice tried to limit myself to fellow believers, my wife's branch of the faith is a bit less accommodating and her fundamentalist still holler about Vatican II making folks of her generation more likely to stray from their church's preferred path.