I don't Know What To SO :'(

tell him how you feel about him doing this stuff. no your not dumb for waiting!! but no matter what if you love him and hes your good friend than try to help him through it. be there and try thats all you can do.

Best friends will always be best friends no matter how much they change, The person you knew is still there, he may just be caught up in a few bad habits pressed on by other friends. Tell him how you feel, and be honest with him. You don't need to be direct about likeing him, but you should be direct on telling him what you think about his new habits.
~Shadowed~

I think the problem with some guys is that they can get too comfy with you and think they have to stop making effort to make you happy. Try not to always be so available when he wants something...i know it will be hard but that way he'll appreciate you more and hopefully hell start making the effort again xx

~ Let him know that you can't sit around and watch him rip his life apart. If he continues to do all of this...it's totally not worth it. I know it's hard to hear that and you probably don't want to believe it...but it's the truth. If he refuses to stop, and you still hang on to him.. he's just gonna drag you right back down with him. My advise is to get away as fast as you can. No matter how much you love him, you can't let him ruin your life. I know it will be hard, but you have to do it...