Not according to himself.
I don't think so. He was never cheated on like Tom.
No he has not.
In games often since he and Bill hates to loose. In relationships yes, according to his ex, but he was like 15 and it was just kissing other girls in the schoolyard.
Yes, Bill Kaulitz has said in an interview that he would date a fan.
Bill Kaulitz
Sure!
No, he had a "get out of jail free" card.
No he wasn't ever there. With or without Tokio Hotel
They are brothers - no.
no, but bill has back in '08
not bill but Tom did want to
Bill Kaulitz,