my little runaway

Bennett had a really difficult day today. He was a little off when he came home from school, but he said everything was o.k. He even got all his work finished at school, which doesn't happen very often. We were in the middle of cleaning the house when he got home so I gave him a list of his chores and he got to work. A little later I found him screaming at Isabel. Apparently they had different cleaning strategies and so I split them up by giving them jobs in separate rooms. I thought things were o.k. and then a little later Isabel was crying and Bennett was screaming again. Come to find out, Isabel was putting a toy away and had to walk by where Bennett was cleaning. Bennett didn't want Isabel in the same space and threw a hat at her, which hit her in the eye. Instead of apologizing he started screaming at her, telling her to get out and not to come back. I was really angry and told him, yelled at him, to knock it off, and to control his temper! While I was mad, I was screaming at him to control his temper! (quick someone sign me up for mother of the year!) A little later, Bennett finished his chores, so I said he could go out and play ball with his Dad. I was finishing up with the laundry, and having the kids put their clothes away. I called outside for Bennett and didn't see him, so I asked Jason to check upstairs in his room. Bennett wasn't there, so Jason went outside to look around while I checked the rest of the house. For some reason my kids think it is funny to hide in closets and under beds while I'm looking for them, so I was searching the house. Still no Bennett, I got this feeling that He had run away. He has never does this before, but I really felt that I needed to drive around and look for him. I quickly headed out the door, and went to the school first, thinking that he would go somewhere familiar, but no luck. I thought, maybe he went to his grandparents house, so I headed that way. About two miles down the road, I see Bennett walking on the side of the road. He has his back pack on, stuffed full, with his hockey stick poking out. I pull up along side of him and ask where he is going, he says "I don't know." I open the door and tell him to get in, trying really hard not to get mad, but the thought of all the bad things that could have happened to him start racing through my mind, and through my tears, started asking what he was thinking, where was he going, where did he think he would eat dinner and sleep. Then I saw my purse on the car seat, opened with my wallet out and opened. So I ask, "Bennett, did you take my money?" He shakes his head yes, and says "I thought I would need some for food." I was so angry by this point I thought I had better not say anything else, until I calmed down. We got home and Jason took him out and had a talk, then they headed to baseball. When they got home Bennett said he was sorry, and that he was mad because he felt like no one in his family loves or cares about him. We had a long talk, and I told him how much we all love him, that it is o.k. to get mad, but not o.k. to take it out on the people around him. I hope it sunk in, but I am really worried about him. He is at a really hard age, he is no longer a little kid, but still not a teen, and is feeling lost. I tried to explain to him about puberty, and that he would sometimes fell sad or angry because of the chemical changes in his body, and that it's o.k. to feel this way. That it's normal, but it is not o.k. to act out in these ways. That he can always talk to me about anything, and I will always be there for him. I don't know if it helped. I can remember trying to run away when I was little, and I think I turned out o.k. Maybe I am making to much of this. It just really freaked me out. Does anyone have any advice on ten year old's? I need help!