Overdose of emotions

I don't know what to do. I am leaving a place where I spent the last couple of years away from home, cribbing about it every now and then. But, it did become my life. Everything about it, the people, the places, the conveniences and what not. I try to tell myself, change is good, and I really am wanting that change, but I just can't stop feeling sad or overwhelmed about the fact that I am leaving in a month's time. Everyday I just think of how it would be when I don't have this aspect of my life here anymore and it tears me apart. Seriously, just don't know what to do...