isn't it too early for this?

Alivia goes to daycare and there is a little boy in her class that she has come quite attached to. His name is Liam. She has good taste, he's pretty cute!! A few weeks ago I dropped her off and when she saw him, she jumped out of my arms and started following him around. This is when I first started noticing this whole thing. A few days later, I picked Alivia up kind of early and they were just getting up from their naps. Alivia and Liam's cots were next to each other and the teacher told me that Alivia was rubbing his face, the teacher said "what are you doing?" and alivia said "i'm just trying to touch him" Earlier this week Alivia was crabby and didn't want to go daycare so I said "Let's go to daycare and see if Liam is there today" to which she said "He's not your friend mommy, he's my friend" Liam's parents are teachers and were off work yesterday so Liam wasn't there. The teachers said she was sad all day!!! Today, the kids were sitting around a table threading beads. Alivia pulled up a chair next to Liam of course and they were taking turns threading, Liam then said " Livy makes me so happy" CAN YOU BELIEVE IT?!?!?
Isn't it too early for this?!?!?!?