What should I do?

An answer to  a boy who fell in love with his bestfriends sister

In this case you maybe should talk about it with someone that you trust. If not your parents, why don’t you ask someone old that know the troubles of love. You have to think this through, because it’s a big decision. Is your relationship with your friend worth to risk for a love? When you are ready to talk about it with your friend and his sister, I think that you should start with the sister. She has the right to know about your feelings. After that you can decide if you want to share it with your friend, which I suggest. It’s important that you are honest to your friend, but most of all to yourself. If the love is mutual the decision lies in your friends hands. Can he accept the love between his best friend and his sister? If the sister doesn't love you back, you probably should try to forget her. Once again, be careful! To fall in love whit a family member of your friend is a perilous path to take.