To me the key words are "don't know if" I would take her out, and find out what it is she is struggling with. Love her and help her regain her Testimony, That is the key. If you love her and help her become stong again, she will either tell you, or overcome it on your own.
And never underestimate praying together. It is good for her to hear you tell the lord how you love and care for her, and want to help. I think we should often express our love for our companion to the lord, in prayer so they know how much we value them.
Also, in my opinion, do not just have a recomend, use of it will bless all in the home