Have things changed?

So, I finally went with a decision to tell my friend today. Now, I just have to make sure it all works out. However, the bad thing is that I notices that I have been in a very bad mood and its been showing in my personality and the way I act around and to people and friends. Nobody seems to like it but I just dont know how I can controll it. It's like something or somebody has taken controll of me. I can't help myself from being like this. It's just who I am i guess.