Robert Pattinson gets "paranoid" whenever new people approach him.
The 'Remember Me' actor reckons fame has ruined his social skills and he now can't help being suspicious whenever fans he doesn't know approach him.
Then later I think, 'What if this person only wanted to be nice?'
He told The Sun newspaper: "Being well known is a real burden. I'm less open and have noticed that I'm actually getting paranoid. If people push themselves on me I find it grueling and repulsive.
"If I even think someone wants to approach me I feel the need to scream, 'What do you want of me'.
"Then later I think, 'What if this person only wanted to be nice?' "
The English actor also finds it "frustrating" spending long periods of time on film sets with no time at home, meaning he has lost contact with most of his old friends.
He added: "I've been forced to stay in a hotel for the last three years. It's frustrating. I got back to London and found out I had lost my whole social life.
"It's tough maintaining it when you don't speak to anyone for over a year. I am now trying to get back in touch with some friends through the internet."
Robert, 23, admitted his insecurity stems from the fact he feels he has yet to prove himself as an actor.
He said: "It's all been given so easily. What did I do to deserve this adulation?
"I am convinced I need to work at least ten full years to actually earn the status I'm apparently being given.
"I want to grow as an actor. I don't want to be typecast as the romantic hero. I'm not going about wishing everything was back to how it was in the past - although sometimes I do as it was so much easier."