How do you know when a relationship has gone bad?

A relationship is to be 100% and 100% on each ones behalf not 50-50. All you can do is your part and if you find they are not pulling their weight or contributing to your relationship then you will have to sit down and talk to them concerning this.

You know your doing too much when you start feeling resentment,when you start adding up all the things you do and what your partner doesn't contribute,it becomes a cycle....some people are givers others are takers,you have to ask yourself, how much am I willing to give,and not get back,it's basically a choice of how much anyone is willing to put up with.