We're about ready for baby number 2 but I'm worried about how my oldest will react. He is so…

We're about ready for baby number 2 but I'm worried about how my oldest will react. He is so attached to me, he sleeps right next to me and we spend all day every day together. He is all about mom 100% of the time. Will he adjust to the new baby and be able to "share" me? 😩