How much to change urself for the person u like.

I was a very short tempered person till a year back. But it hurt my friends quite badly. So i started to control my temper. My openness which my frenz liked a lot before, became a thing of concern now. So i thought i will change myself again for them as they dint like me being so open. But there came the toughest phase of my career. Am i losing myself in trying to change. But losing friends was even more painful. So i brought it upon myself to change my very "basic nature". I started thinking ways to make them happy always. I have achieved that a little now. But I did realise a big truth in this phase of my coll life. My happiness indeed lies with their happiness. And above all the biggest happiness i got is seeing my best frenz happy. And here I end with the few lines which tell about my frenz,

"Kaise Mujhe mil gayi tum,
Kismat main aayi na yakeen"