Are you sure that this guy is the kind of friend you need in your life? Sadly users exploit everyone around the, it was his choice to drink and he took advantage of your good nature. This wasn't your fault. If you choose to keep this guy as a friend you will have to learn to walk away from requests like this, are you sure you have that inner strength? Also are you sure he won't drag you down? I don't want to judge I just want you to be safe.