Please Help, A boy that i really love is gonna do something stupid on Monday...how do i stop this?

Well, if it's on campus then I guess things should be safe unless if your friend of the head gang is planning the next Virginia Tech macre. Maybe make plans with your friend that same day so he has an excuse not to show up. Or if worst comes to worst tell him that you don't think it's a good idea. Just be careful that your friend doesn't ociate with the "wrong" kind, because friends have a very powerful influence on you.