Verb conjugation of "cooperare" in Italian

Let in rain again. I love listen to music on the weekend while it rains. When I used to live in Darmstadt I hated the rain, but since I live in Greece, I love it because it does not rain that often here.
Drinking coffee at night is supposed to be bad. Why? I have no idea. I believe the contrary is true. Coffee opens my veins and let's blood flow better and quicker. I therefore have nicer dreams, mainly from my last vacation in Italy.
So this is my last week here in Germany, then it's back to Italy. I'm not sure if I will return soon. But I am longing for friends and family. I will certainly return one day, that is sure.