My avocado tree, which I have had indoors for more than five years, has leaves that are turning brown on the edges and then dropping off one by one. Any advice as to what is wrong and what I can do to fix it would be appreciated.

Wish I had some advice for your Avocado Tree, but I am trying get my own started... i dont know if it's going to work but I have a seed and would like to get it to grow. And suggestions.