What to do?

How do you tell someone that you consider that a friend WITHOUT ruining the friendship, that you are feeling used? It seems that our definitions of “help” and “together” are totally different. I feel like all I’m being expected to do all the work, with very little assistance, with very little input. I don’t think my friend understands how much work it really can take, which is even more of a big deal when added to all the other stuff I have going on. Hmmm,… I know my friend is busy, but I am, too.