Here are three things you can do if your partner is less interested than you in their spirituality:
1. In the first instance, do not worry about your partner or expect them to 'get it' in terms of spirituality. Focus on your own emotional healing and spiritual development.
2. If you are embracing your spirituality, you will be acting as a loving role-model for your partner. Somebody who is truly at peace and spiritually connected to Universal or Divine love will be irresistible. Your partner will want some of what you have!
3. If your partner is negative about, or attacks your spiritual efforts, realise that this is a deep reflection of your own spiritual resistance or rebellion. Use there behaviour as a way of understanding how you might be avoiding critical issues in your spiritual growth.
Of course don't forget to pray and ask for God's (or what ever you believe in's) help that your partner might find their own faith.