Anyone else feel this way?

My daughter is almost 2 and we do everything together. She can't even nap without me cuddling with her.
I've always wanted a big family but lately part of me is scared about losing this closeness with her. 
She absolutely loves babies and I think would love a sibling but that would also mean she wouldn't get free reign over me like she does now.
Did anyone else feel this way when TYC #2? What did you do?