Snapchat premium!!!

Found out my bf has been paying for snap chat premiums he spent $60. I talked to him about it he said he’d stop but I feel so embarrassed by his actions. He gets sex almost every night why does he feel the need to do this? It’s pathetic! I don’t care if he watches porn but to buy it is a different story!! What should I do? How should we move forward from this? Has this happened to anyone?