Very difficult night

I had a very difficult night with my uncle.  He was suicidal and I am suicidal and I don't know what to do.  He still has a gun and is drinking and did give me his word about what things he would do to make things different.  I am scared for him and am scared for my life.  I am suicidal and saw very diffiult situations with him.  He was so drunk he was screaming that he was in a suicide scene.  He was so drunk and he carries a gun with him.  It is so scary.  I am very worried.  This is not the first time he does that.  I am so depressed and upset about the situation.  I was worried that the was going to think that I am friends with benefits and wanted to only act as a therapist to him and not a friend.  I don't feel I have anything to say these days.  I feel empty. It sucks.  It is such a scary situation.  I want to call the cops but my parents won't let me.  I know it.  They are taking it so calmly.  I know they are very upset and might lose sleep but they don't know why.  I am so upset and scared.