Seperation Anxiety

I left Little Man with James for the first time today. I went grocery shopping. It was kinda nice to get out of the house I guess, but I had some serious anxiety about leaving my baby. I planned it so that I would be gone when he needed to eat so that James could give him a bottle. My midwife suggested that we give him his first bottle when I wasn't around. Apparently, everything went just fine. It must have, because he ate three ounces! James said he even burped really well. So the good news is that Little Man has no issues with taking a bottle; the bad news is that he needs me less and less everyday already. I just want him to stay little forever! He's so sweet and perfect right now. Why does he have to grow up??