Do Unto Others

I was speaking with a good friend of mine today and we had a lengthy discussion about various topics. I like speaking with this friend because I always walk away feeling more purposeful and strengthened after our conversations. At one particular moment during our talk the proverbial light bulb went off in my head which provided me with a lot of clarity pertaining to one of my patterns of behavior.
Someone I know is struggling with a life issue. This struggle has been going on for many years and the person seems like they are in a lot of despair about it. In my relationships with many people, I try to serve as a support system. I listen to their issues and try to problem solve with them and help them see how they can possibly make situations better. With this particular person I have tried to offer encouragement, resources and have even offered my own time to try and assist in any way I can. Every time I offer something, this person responds with an endless string of negative and sarcastic remarks. Deep inside I know that these responses are a part of this person's defense mechanisms but I'm a little annoyed.
This person asks me for help and then doesn't want to accept any guidance. My question is: why complain? I think the remarks that I receive in return for my suggestions are quite insulting but as I mentioned earlier during my conversation today the solution hit me: I need to stop offering guidance and advice to this individual. Its obvious that the person wants to complain but does not really want to accept help at this time and to be honest, I don't need this shit right now. I have my own life to live and I have my own goals I'm going to reach. The energy that I am pouring into this person is not doing me any good. After a year of encouragement, if this individual can't change their negative thinking, there is nothing more I can do to help. I have mentioned in posts before that I am tired. I am also tired of people wasting my time.
So with that being said, I have decided to take that 10% of energy that I was focusing on that person and redirect it to myself. I try to follow the golden rule and I try to provide stability and support for those who I think need it. Unfortunately, if someone insists on being negative I have to back away because eventually their negativity will rub off on me and like I said before I don't need this shit right now.