Opinion on gambling

Does any of your boyfriends/husbands gamble? My boyfriend does and I really hates it. He says he gambles with little money but I know he is lying. He looses a lot then keeps complaining about it forever. He promises me to stop but never does. He never listens to my advice and only does what he wants. Gambling is even forbidden in my religion. I feel like one day, he will gamble with the money we save to our kids. I so don't like what he does and most importantly I hate that he doesn't take my advice seriously.

What to do?