Neenar Neenar Neenar

So before I begin this post let me state that this is not aimed at anyone specifically but just something that has been thrown in my face a lot recently.
So it seems when people get engaged, start dating, get married suddenly they change. This makes some sense they have a new person in their lives and therefore it makes sense that their behavior would change. But lets talk about some of the changes. People suddenly change plans on you last second b/c they are going out, or you know they can say or do whatever they want b/c after all they are engaged, dating, or married. So they can treat you like crap, they can hurt your feelings, and you just have to accept it b/c its the neenar neenar neenar syndrome. I have something you want and therefore can talk down to you, and you can't do anything about it. So for example, you have to sit where I tell you, how I tell you, act the way I tell you and again neenar neeenar neenar. This would be fine if you had a way to combat the syndrome but alas as long as you are single and are trying to be yourself it means you are now a lower life form. Not a human on the grounds that you are still single regardless of anything else going on in your life. I had two people both younger than me this past week talk to me as if I do not have two brain cells. One of them informed me that I have to watch my language in my office in front of a 26 year old. The other informed me that b/c its related to her I have to do anything and everything that she wants. I'm sorry if I'm a friend why do I have to change my behavior if I am not hurting anyone. So it is back to the neenar neenar neenar syndrome. Sigh. If anyone has any ideas on how to combat it please let me know. Thanks.