Being nice

I kind of believe in karma. When u do good to people, good things will happen to u.

What i experienced was different. I was good to others..being the very best i could to please them. But i never was treated nicely by them. When they need me, they'll come and find me. When they're done, they'll just go and then it's like nothing happened and they never treasure and appreciate. 

Am i wrong for being nice. Should i stop? Because in the end, i suffer! I am the one being left behind. 

Oh..btw, i hope i will never hear u calling me my nick name. Only close people call me using that name. U're just not worth to be called a friend.