Someone's clinging to me, and it's bittersweet

Yes, I am a Mariah fan. You have to be to like Crybaby.

So my son does not like being dropped off at daycare anymore. He clings to my arm and cries. It's sad. I try to make my comings and goings as non-momentous as possible, but he still has a meltdown when I drop him off. It's hard on me, too. Any ideas, other moms?