confused, who really i am

Actually I don't know what actually happened to me lately. I try to stay away from my friends but I don't know why. Is that something wrong with me??? arggghhhh.. I'm so confused. I want to be with them but I don't why I'm acting like this. Preferred to being alone and talk not much like I'm before. I'm a talkative person but now seem not who really I am.. What had happened to me until I becoming someone like this?? Am i doing something wrong or am I seem not suit for them anymore?? Am I so stupid to be with them?? Sometimes, I think it is but I'm not sure. They really nice to me and I love them. Now, it still the same but I seem like to stay away from them. I miss you all but I don't know what happen to me. I'm sorry my beloved friends. Not because I don't want to be your friends but now I think I need to think and being alone for a little times. Sorry dear....