Dear Jessica,
I want you to know, that not all the families are perfect, so there're some problems about it. Parents physically can't spend more time with their children, so they feel lonely exactly like you do. Try to talk about it with your parents, trying to remove this problem. Suggest them go somewhere together, where your parents and brother could forget about their work or any technical machine. You can go to the cinema, picnic, theatre or just stay at home talking about something interesting. That's easy enough, just try!