When the cancer feel tired

i just read a post from my friend's facebook profile.. He said he is a failure in the pathway of his life, he made people around him allergy of him.. i feel kinda same with him, this post makes me feel a bit bit down and sad..
Since when, my concern and care is suffocating someone?? i dunno actually.. may be it's too easy to be friendly, may be the horoscope is right, cancer is a caring one.. i was once a typical cancer.. Sharing, caring, helping filled my life and i was very happy of it..
But now, i had changed.. i'm gonna step into the backside.. coz everytime i try to treat people in the way i used to be, it turn up into a mess, terrible mess.. and i became so tired and sick of it.. i give up and i give in, coz it's the heart that matters most.. no matter how, people can treat me like an enemy, but it doesn't mean i can't treat me as my friend.. so i will do my part as a role of friend, without asking or hoping for any return.. i had been picking up pieces of my broken heart from the valley of sorrow for countless times..
The horoscope said, underneath the hard shell of cancer, there is soft brittle heart.. that's why i hide my heart under my shell, with limited access into it.. becoz, i'm afraid of another hurt again..