I want to ask that, I have been in a very short relationship of about 20 days with a guy. We got little bit intimate that’s it, then he just broke off. So I ended everything. Then I fell for his friend. He is so good to me. Should I tell him about whatever happened between me and him or just tell him this much that we were close but no such thing happened. What should I do?

Guys have a habit of talking about their affair; including every detail of what they did, with close friends. This is truer when they have already broken off. There are all chances that he may talk about your relationship to his friend so if you do not want to take chance then honestly tell him.