I feel so bad

Last week I yelled at a little kid cause if I didn't he would of have gotten hurt. His mom wasn't watching him. I made him cry. His mom said don't worry. He is like that. He cry over little things. I was thinking to myself. It sound like me. I feel so bad for yelling at him and I  made him cry. I went to buy him a bag of chip. I end up buying all the kids chips. I couldn't just get one. To cheer him up. Was I wrong for yelling at him? I didn't want him to get hurt. That's all. Is it bad to be to sensitive or emotional? When I do have a kids. My eyes will be glue to them like a hawk. To make sure they don't get hurt. I would spend as much time with them. I would spoil them. I would teach them respect and manners. i will do anything for my future kids.