Can you give me some advice?

Being the type of person I am (opinionated), personally, I would voice my concerns. If he denied it, I'd probably slowly distance myself and make up half a s s e d excuses, obviously he wouldn't care. However, if he says, "You know, I noticed I've been a jerk, I'm sorry, I'll try to be better," or something along those lines, I'd give it another shot. But I'd never let someone s c r e w me over more than twice; the second time, the friendship would be over.