T.
Separation anxiety is normal at this age. You might let him take a favorite toy with him. When my son was little, he went to Mom's Day Out. I would have to kiss him on both cheeks before I left. I told him if he missed me, he could touch his cheek where I had kissed it and remember that I would be back soon. I have heard of moms who would leave a lipstick print on the child's hand or cheek and tell them that as long as the lipstick was there, mommy would be back soon. I didn't want to leave lipstick on him because I was afraid he would freak out if it got wiped off. Try reading books such as "The Kissing Hand" and other books about mommy leaving and coming back. Always tell him "bye" when you leave. If you ever try to sneak away while he is playing, he will learn not to trust you and will be more afraid every time you leave the room to do anything. Good luck!