Be Spiritual Together
Spiritual pursuits can help you strengthen your relationship.
Sharing your faith -- either a specific religion or general feelings of spirituality -- with another person opens life in not only a secular way but spiritually as well.
A belief in a specific higher power isn't a requirement: On its own, a shared life philosophy can help build a connection to something greater.
Worship together will build a common Faith in all what is good and challenges that you face as individual or as relationship at all