Unsure

I'm really unsure how to handle my oldest son. He is my quiet guy not much of a talker but I can tell things are bothering him. He lashes out in little ways like if I ask him to sweep the floor which is one of his chores he does such a bad job that he has to do it two or three times before it is acceptable. He is so disgruntled about doing said chore. I just don't know how to get through to him. Today he didn't want to go swimming but everyone else did so he just sat on the side staring with a mad look on his face. When I tried to talk to him he just told me to go away or would start crying. I just really fear if he keeps it all inside at the ripe old age of 9 what is it going to be like when he is 13 - 18 when the things he is going to deal with are extremely difficult and he will need me and his dad. I just want to cry and make him talk but instead all I found I can do is pray. Pray that I can take him to God's word and show him how much he is loved no matter what the world says. Pray he will open up with me and talk about what is going on. Pray that I can help him work through it when that time comes. Pray that I can be the best parent for him. I'm just so scared sometimes that I am going to mess my kids up. I just want them to be healthy and happy and know how much I love and care about them but I fail so I pick myself back up and try again. If you could just pray for me and this whole situation with Monkey that would be great. I pray that this upcoming week will be so great for him to be at camp away from life and be able to learn and grow in his faith. This is really vague but I think we have some really serious stuff going on with him.