This is from Kaleah LaRoche's "Seven Steps to Breaking Free from Narcissistic Abuse". You can download this book for free from her website. I found it helpful, maybe some of you will too:)

When you realize that you are dealing with a narcissistic personality or any emotionally abusive personality it is important to leave the situation. Get over the idea that you can make it better or change the person. You can’t change anyone! The only person you can change is yourself.

You change yourself by refusing to allow yourself to continue to be abused. You deserve to be treated with dignity and respect and sometimes you have to demand that treatment for yourself. If someone constantly undermines you and belittles you then they don’t deserve to be around you.
The longer you stay with the narcissist the worse it will get.

You may have honeymoon periods but it will always go back to worse than it was before. If you believe it will change, you are living in a fantasy land. Coming out of the fantasy is the same as waking up from the illusion you have been living under. The illusion has to crumble and you have to face the truth.

The truth is he is a narcissist! He is unhappy at the very
core and will continue to project his unhappiness upon you if you stay connected to him. The sooner you disconnect to him the sooner you can recover your energy and get on with your life.

Yes, he will go elsewhere! That is what narcissists do. They have to have a canvass which to project their inadequacies upon. If it’s not you it will be someone else.
Don’t envy the honeymoon period the new source of supply may
have with your ex. He has scapegoated you and dumped on you all the negative qualities he has repressed within himself so he seemingly has a clean slate in which to start over. However the more you purge what he has given to you, the more the energetic scales will balance and his well of negativity will fill up once again.

The new source will soon be the target for these repressed
emotions, just as you once were. It is only a matter of time.
Think of it like this! The more you reclaim your energy, your power and your sense of self worth, the more energy you are taking back from him and the more he will be dumping on the new source. It is really like an energy exchange. He has extracted your energy and can use it to seduce the new source with. However what will he use once your energy has been taken back? Hers!

If you sit around on your pity pot and say woe is me, he left me for a younger, smarter, slimmer, more attractive mate than you will continue to feed him with your power. You will continue to feel that something is wrong with you. You are not the problem. He is! Your problem is that you allowed him to dump his B.S. onto you!

It’s time to say goodbye, once and for all! Let him go! Sure you might have loved him, and sure you had good times. But that is over! Love yourself now! Love yourself enough to say NO MORE!

Trust in your intuition. Trust that what you know somewhere deep inside is true. You are a worthy individual and you have a lot to offer. You are capable of having a loving, healthy relationship. It is only that you need to love yourself first and have a healthy relationship with life. Once you achieve this you will attract healthy people into your life and you will be attracted to healthy people.

The relationship you have been in is NOT healthy! Don’t take all the responsibility for that! Take a little! Take what is yours! But give the rest to him! He is the one who could not be responsible for anything! He is the one who couldn’t have a normal conversation! He is the one who cannot relate on an equal level but always has to one up you, or appear superior in some way. You don’t need that!

It is good that you are leaving the past behind. It is time for you to start fresh! You are the one who will end up getting the better deal! You just have to ride it out! You have to take back what is yours on an energetic level and then you will be free of him. But he will still have to live with himself.

Say goodbye! Farewell! Close the door! Don’t open it again! It is your only way out!