Caring For Someone, how do you cope

A very good topic i havn't seen this brought up before but it maybe has been. I myself am a carer for my 8 year old step son, he is severly disabled he can't walk or talk every morning i get up around 7am come down make his breakfast make sure all his meds are in there then when he has finished i get him washed and ready for school or dressed if he is not at school. He relies on me and his mum to do everything for him, he is not the size of an 8 year old more a 4-5 year old. The hardest thing for me is when he is crying or upset because he can't talk he can't tell us what is wrong if he is feeling sick or ill or if something hurts and it's very upsetting to see. For me the possibility that he may be able to talk or think in his mind but just not be able to say it vocally is the hardest thing to think about and i do that as little as possible, i make sure i am always there when he needs me and there is nothing i would not do for him no matter how hysically or mentally draining it may be i will not stop until my mind and body will not work no more.