The purpose of having boundaries is to protect and take care of ourselves. We need to be able to tell other people when they are acting in ways that are not acceptable to us. A first step is starting to know that we have a right to protect and defend ourselves. That we have not only the right, but the duty to take responsibility for how we allow others to treat us.
It is important to state our feelings out loud, and to precede the feeling with "I feel." (When we say "I am angry, I'm hurt, etc." we are stating that the feeling is who we are. Emotions do not define us, they are a form of internal communication that help us to understand ourselves. They are a vital part of our being - as a component of the whole.) This is owning the feeling. It is important to do for ourselves. By stating the feeling out loud we are affirming that we have a right to feelings. We are affirming it to ourselves - and taking responsibility for owning ourselves and our reality. Rather the other person can hear us and understand is not as important as hearing ourselves and understanding that we have a right to our feelings. It is vitally important to own our own voice. To own our right to speak up for ourselves.
It is impossible to have a healthy relationship with someone who has no boundaries, with someone who cannot communicate directly, and honestly. Learning how to set boundaries is a necessary step in learning to be a friend to ourselves. It is our responsibility to take care of ourselves - to protect ourselves when it is necessary. It is impossible to learn to be Loving to ourselves without owning our self - and owning our rights and responsibilities as co-creators of our lives.
There are basically three parts to a boundary. The first two are setting the boundary - the third is what we will do to defend that boundary.
If you - a description of the behavior we find unacceptable (again being as descriptive as possible.)
I will - a description of what action you will take to protect and take care of your self in the event the other person violates the boundary.
If you continue this behavior - a description of what steps you will take to protect the boundary that you have set.
One very drastic example (in the case of someone who is just learning about boundaries and has been physically abused in the past) would be:
If you ever hit me, I will call the police and press charges - and I will leave this relationship. If you continue to threaten me, I will get a restraining order and prepare to defend myself in whatever manner is necessary.
It is not always necessary or appropriate to share the third part of this formula with the other person when setting a boundary - the first two steps are the actual setting of the boundary. The third part is something we need to know for ourselves, so that we know what action we can take if the other person violates the boundary. If we set a boundary and expect the other person to abide by it automatically - then we are setting ourselves up to be a victim of our expectation.
Setting boundaries is not a more sophisticated way of manipulation or control- although some people will say they are setting boundaries, when in fact they are attempting to manipulate or control. The difference between setting a boundary in a healthy way and manipulating is: when we set a boundary we let go of the outcome, when we try to manipulate or control, we are trying to influence the outcome.
So ask yourself the question: are you setting a boundary, or are you trying to control an manipulate under the mask of setting a boundary?