I fancy my teacher, and feel really sorry for him, please answer this is my first question :') ?

have him alot, hes my science teacher and people are always naughty and noisy in his class like a boy in the class yesterday was answering back and the teacher shouted at him to get outand the boy swore at him and threw his pen accross the classroom, we then had to copy out of text books cos he couldn't be bothered to finish the lesson, he just can't handle it anymore and neither can I cos there are too many timewasters and I really wnat to get involved and sort it out, ok I jsut have to say this next bit: I fancy the teacher ok, and i'm stating to feel really sorry for him and want to help, but I don't wnat to ignore it and let it carry on cos he is 25, sort of new and may even end up quiting if this keeps happening, as it happens in nearly every lesson, but he can't take it, and neither can I :( please help, I want to help him ;( but I don't want to get involved too much cos it's his responsibilty to sort out the class and people in it which he isn't managign very well, but i mafraid he might just say i'm ok I can handle it, and he's not often in his classroom and has lessons and stuff so I dont no wat to do, i'm in year 7 bu the way :/ helpp (I fancy him so I find it hard to talk to him, thats why I feel really sorry for him and am too pissed off about the time wasters in the classes we have) At the moment he's been really moody, maybe because we are noisy and he's strict to us to make us learn a lesson, but I don't think he'd do that. i think it may be somethign personal, but I think he'd tell us taht something bad has happened and he's not in the mood for a few weeks, thats all but I tihnk it may be something really perosnal that is annoying him in some way, but I do not know this for sure, k help me please :)