Should I or Should I not?~

A counter offer had been made to me and I have to make my decision fast. I had this thought a few weeks back - what if? but I denied the fact coz I have no rapport with the Boss himself even he used to be my former superior. Somehow, I am honoured by the offer made.

But in my mind I wonder, should I? I am hesitant. I think I have to stand on my ground. I am happy the way I am right now. I will feel bad if I were to choose that offer. But someone said I shudnt feel so. Undecisive rite now. Shud I or shud I not?