Jumping onto Conclusions

I have something that most people suffer from, I tend to jump onto conclusions instantly if not in a very short time. If someone smiles at me, I tend to think they like me, If someone scolds me I tend to think they are sad because of me. This jumping the gun kind of Instance is very frustrating and I'm not liking it lately. 

This never bothered me much before but now it is. Hope someday this will change.