J.R.
My daughter was the same way and this too shall pass. She was pretty much a mommy or daddy's girl for the six months! We tried staying in the same place with her but out of sight (so she could still hear our voices). I know that's easy to do at home and not so much at church etc. We also tried leaving her for an hour or so with friends or family every couple of days - just to get her acclimated to different surroundings. Always try to bring your son's favorite things (stuffed animals, blankets etc.) so he may find some comfort in the time he's away from you. Maybe try to go a little early so you can sit with him and talk so he doesn't feel like your going to leave him immediately. I don't know if it's possible, but maybe stop in there with him a different day of the week - just for a minute or two. This will teach him that it's not a place to be afraid of and that you're not "abandoning" him there. Good luck.