Ahhhh! Time goes too fast!

My little baby girl just rolled over BY HERSELF for the first time! She's only 4 months old, people. I can't believe it! She is getting so big. Part of me wants her to stay small for awhile longer. I still want a baby. But she is just getting so big. Ryan can already balance her in his hand, and she loves it. She pulls herself up to a standing position when she has your fingers, she's trying to sit up.... Oh my! It's going too fast!