ranbir's past efffecting his present

FOR THE 5TH 1 I MEANT "OR DO YOU JUST LIKE HIM THE WAY HE IS"

I had the same thought as you. I thought he had a bad experience with a girl before and hence he started hating love. Remember when he was talking to Aditya he said that he had gone out with his friends to watch his movie and ate the tomatoes that were thrown at him. It tells that he did have friends and enjoyed life a lot. Probably something made him into the current Ranbir.