They manipulate a situation to get you to do something you would not have otherwise because you want to make them happy. Then it is all about them getting what they wanted and then later you look and say...wait a minute...that is not what I wanted, oh well, can not change it now. To stop it... Stand up to the manipulation. Usually if what they are doing does not work they try intimidation. (bullying) And how do you stop a bully. Stand up to them and let them know it does not bother you. You will then be called heartless and told you do not care aobut thme...they turn into the victim for sympathy.... It is exactly like dealing with a 3 year old! You have to be the parent and say....this is not acceptable behaviour...I will give you anpportunity to try again because I care and do not want this realtionship to be onsided but partners.

Thanks

Manipulations and Controlling from other person is successful only when we let it happen. Once we realize and understand our feelings and thoughts its easier to say NO or STOP to manipulator or Manipulations.

Emotional Blackmail by Susan Foreward a good read.

When they interrupt what I'm saying with "no, but..." or try to guilt me into something.

How I stop it is usually by getting angry with them and loudly voicing my objections.

I do not respond well to codependent thinking.

You can't stop someone from attempting to control you. The only thing you can do is learn to recognize their attempts and then ask yourself why you are remaining in a relationship with someone who is attempting to manipulate/abuse you.
Listen to that little voice, that niggling feeling when you are around the person you suspect. Do you feel uncomfortable? Do they say things that you suspect are put downs/? How do you feel about yourself when you are with them? Are they guilttripping, blameshifting,demanding or trying to talk you into doing something you will regret or encouraging you to participate in something that will damage your self esteem?
Whose Pulling Your Strings is a great book that will help you to recognize your vulnerabilities as well as to recognize when someone is attempting to manipulate you. I forget the author's name, sorry.

They will emotionally manipulate. Example. I'm sleeping in the living room because I'm angry. Emotional manipulation......"I know it is over if you do not come to bed". This is an attempt to control. How do you stop it? Decide for yourself what you really want and usually even if it's something that is upsetting to the other person it is on the how them how they behave. It's sometimes better just to tell someone you need time and if you know they're manipulating ask the to stop.