person A: Last year_comma_ when  my kids were both at school_comma_ I would get lonely at home sometimes.
person B: I can understand that. It's usually either parents are happy they are out of the house_comma_ or sad that they're gone. I'm sorry you feel lonely. 
person A: Most of the time I'm happy and content but occasionally I get lonely.
person B: I can understand that. Kids have a big presence and their energy creates a void. Hopefully you can find things to take your mind off of it. 
person A: It's weird how they can drive you crazy when they are with you but you miss them the minute they are gone!
person B: Yes it is. My youngest has been away all this week for his first summer camp. It's been both awesome and lonely. 
person A: They finally go back to school next week and I'm looking forward to it but I know I'll get lonely at times.