My brother needs help.

Well, my brother has always been good with everyone,always had friends,going outside ,a normal teenager.(btw im 15 now ,so this started when i was 11)But then , he changed , a lot.  Now his daily routine is: Never wakes up before 10 ,unless he really has to or if our parents make him. When he wakes up , he goes into the bathroom,brushes his teeth,washes his face,but then ,he starts saying something to himself,then he washes his face again ,repeats those two things, start talking to himself again for about 5-7 minutes,finally gets out of the bathroom,(btw the when he enters the bathroom lights have to be on , doesnt matter if its day or night, i tried turning them off, he of course notices,starts yelling so loud,the whole flat can hear him.),then he wonders around the house for a little while , goes to the betting place,even when he doesnt have money to bet , he "has" to go there,hangs around at the betting place,then he comes home , to go to the bathroom to talk to himself,finishes with it , then he stays in the house for a while ,goes again in the bathroom to do the same thing,gets out,goes outside till 17:00, 18:00.Then he comes home.

Now here are some other things he does:

If i say 2011,2012 ,or anything related to those years , for an example, : Have you heard the song from Dr.Dre? then he asks me when was it made, i say 2010, he says stop lying , Pulls out his phone starts checking the year it was made in,a lot of red spots starts to show up on his face ,chest ,he goes in the bathroom and starts talking to himself,I kinda heard what he said,altho Im a Serb so the translation isnt gonna be very good: I pull back what i just heard ,repeats that about 10 times, then he says something like help me or something I can't get near him because he gets very upset and has to do all those ''things'' over.

He doesn't let me or anyone touch his hair ,face ,or especially his nose. I don't know why ,at first it seemed kinda funny, then i started getting very suspicious about it.And when i touched it , face turning red thing starts ,then he runs to the bathroom.

He always wears the same tracksuit, has to wear white socks.

And when i say something related from 2011, he does all those things, comes out of the bathroom,starts telling me to say:'' I pull back what i've just said'' or he won't leave the room.And when i don't say it after a while he starts to beg me to do it and starts to get a little paranoid. 

Btw, he is now 20. I know this isn't written very well, I have to know what's wrong with him, my parents won't believe me,and im really worried sick about him. 

I appriceate all the help.