Ask your friend if he has seen one of the items that were stolen. Perhaps he will feel guilty knowing that you are looking for the item and he’ll fess up. If that doesn’t work, talk to him outright about the situation. Be kind, but be firm and to the point.

Confront him about it and ask him to stop. If he doesn’t stop, you shouldn’t be friends with him. If he doesn’t respect you enough to not steal, then he isn’t a real friend.

All you can do is ask him to stop. If he doesn’t, or you just don’t feel comfortable with confronting him, then just stop inviting him over to your house. You could just hang out at his house.

If he is a true friend, he would not be stealing in the first place. If you want to keep him as a friend, then confront him about stealing. If he continues to steal, you need to drop him as a friend.

Talk with your parents and enlist their help in coming up with a plan. You can confront your friend, or if you don’t feel like that will work, maybe you and your parents can make sure that your friend is never alone in a room in your house.