This issue is still a little unclear in Alabama. The question is whether the ring was an unconditional or conditional gift, i.e. did they have to get married for the gift to become final? A lot of caselaw in the State says that if the engagement is called off before marriage, then the groom has the right to recover the ring itself or the value of the ring, meaning the gift was conditional on getting married. I would certainly talk to a local attorney as it seems your boyfriend may have reason to file suit. If the value of the ring is less than 10k, I would advise filing in District Court as it is usually faster and cheaper there.