Hi there.I'm a little confused,are you asking if your family is abusing you or the way you are reacting to them is you being abusive?If you are threatening others and being physical with them,threatening your sister with an object,then yes,it's abuse,you are abusing them.

It doesn't sound as if they are abusing you,maybe annoying you though.Are you in therapy for your anger issues and your reactions?That might be a good place to start and to also get help with drinking before it becomes a problem for you.

Best wishes to you.