Firsts and lasts

This weekend was the first weekend J and I have left Seb overnight and for more then 24 hours. He stayed with James' parents while we attended a birthday in Brisbane. They couldn't be happier about having him and I'm so glad they got too.
I rang last night to see how everything was going and I could hear him in the bath splashing around talking his jibberish. He said hello to me as clear as day and my heart melted.
He proceeded to splash around and then say "oh nooo" then "bye." I know he's growing up but hearing him talking on the other end of the phone while he's at his first sleep over confirmed it for me.
James is on his way to pick Seb up now and I can't wait to see him. I missed him so much and am not sure if I'm ready to do this more frequently. James obviously has to leave him every 5 days or so but Seb and I are generally a package deal.
I just don't want to miss a thing about him right now.