Relationships are a balance of give and take. If one person in that equation feels as though they give more that the other, over time, that could lead to resentment and eventually the loss of that person.
I would say I am at this point, but getting rid of the person is proving difficult :)
It's never easy getting rid of someone @penderis ... especially if you've put a ton of time and energy into that person. You'll find a sense of relief as soon as the deed is done though.