<human>: I have a huge problem of wanting to win every argument.  It has slowly been impacting my social life, and I can see that it is deteriorating my friendships.  I have been struggling with this problem for much of my teenage life, and I would love suggestions on how to deal with this.
  
As of late, I have slowly been improving, and I have improved to the point of grudgingly admitting that I am wrong.  The certain friend that I am referring to knows of my inability to accept losing, and she hates it.  When I do admit I'm wrong, she rubs it in, saying stuff along the lines of "I told you so!"  This infuriates me to no end, and I don't want to be around her after admitting that I'm wrong.  This really is killing our relationship since we both have much to say on almost every topic.  I hope I made myself clear enough!

Also, I experience extreme anger when people attack my opinion with sarcasm at any level of conversation, almost to the point of physical violence.  Any help here would be appreciated as well.

Summarize the given text in a few sentences.
<bot>: I hate admitting I'm wrong; but when I do admit it, I hate when my friend rubs in the fact that I was wrong.  And sarcasm during intense debates pisses me off.