What should I do about my friend?

It sounds like he's let things go to his head a little too much & in doing it, he's not being fair to you. You befriended him when he had no one, now he has a couple friends so he no longer needs you. Nice friend! OR is he really a "friend of convenience" instead. But you just happen to be good enuf when you happen to have a book he needs. I'd say he's using you. Who really needs a "friend" like that anyway. So he just happens to need another book you have? Well, I'd FIRST get the book back that he has, then the book he needs just conveniently just happens to not be available. You do not have to tell him why, you don't owe him an explination, it's just not available. Somehow too I'd tell him he needs an attitude adjustment. He use to be someone you liked, had fun with & enjoyed hanging around with. Now all of a sudden he's changed, & the change doesn't do him justice, it's making a jerk out of him. You tho't he was your friend, now you're beginning to wonder who this new person is. He sure isn't like the old one you once knew & liked. He's not afraid to talk to you & tell you like it is, be the same way back to him. I'd let him know how much you miss the "friend" you use to have, wish you knew what happened to him, but his replacement sure isn't anything like the one you use to know. You're just hoping one day he'll suddenly return back to the likeable person he use to be. The one he is now sure isn't becoming to you. I'd also let him know you sure were good enuf when he didn't have a friend in the world, but sadly that person is gone. Give him some good food for thought, but don't let him use you. That's just plain not fair. Good luck to you...:)