My husband is not observant
How can I get my husband to want to be religious? I have become more religious over the past 15.5 years.
I assume you've tried every way to convince him to come to a seminar. If it did not work, all one can do is pray with all one’s heart every day to the Creator of the universe that he should inspire his heart to repent.
At the end of the blessing of Hashivenu, say the following prayer: “May it be Your Will, L-rd our G-d and the G-d of our fathers, that You make a place under Your Throne of glory, to bring to complete repentance before You all the sinners of the Jewish people, and among them You shall cause to completely repent (your husband’s Hebrew name, X the son of X), because Your right hand is spread open to receive the penitent. Blessed are You, G-d, who wants repentance.”