thank you for your replys.
Upon looking at our seat arrangements, I am actually sitting just the row from him and I think it will work out with either person sitting next to him since both people have aisle seats just like mine and my boy just sit in the middle. I am not too worried. Somehow it will work out.
To a poster asking why didn't i book us as group. I would if I could. However, where we are from, only one flight daily to Hawaii, unlike bigger cities with more flights, hence the reason why this plane is fully booked. And we have to go back home on a Sunday before the kids go back to school.
Thank you everyone. Have a nice day.