I really like this one boy and we are really close friends but my ex likes him too and I think he likes my ex.. What should I do?

Well, are you really looking for an answer or emotional support? Because logically when you think about it, there aren't many options really. I think you know it too. That's the thing about matters of the heart. If you like someone, you can either confess or don't confess. If you confess, you will get clarification. It may or may not ruin your friendship. You may or may not have your happy ending. If you don't have your happy ending, you have to move on. If you don't confess, you have to move on without clarification. Of course you know this too. But it probably won't feel that simple to you. It's ok. You are not alone. You will get through this. Everything will be okay. Please take care.