If you don’t know what your values are you are not plugged into your life. You are adrift and don't even know it. You're settling for whatever comes along.
In order to be plugged into your life you need to know what you stand for, what you will and will not tolerate, where the line is to your self-respect. Above all, you have integrity and what does that mean? It means that if you say you're going to do something then you do it especially if that promise is to yourself.
That's what it means to have values.