Going back to work

Today is my last day with my baby before I go back to work full time. I will still have the weekends with him but I am really dreading being apart from him. I'm getting in all the cuddles I can today but I'm wondering if on the weekends I should not hold him all the time as I do not want him to expect to be held all the time. He is almost 3 months old and such a happy baby and is doing well that I do not want to stunt his development by coddling too much.

I'm looking for any advice about how to act when I am around him as well as things to do while I'm away from him to keep me from crying. What should I do?

Thank you, mamas!