Hi 2nd time around. Sorry that you find yourself here. I haven't been on that long but it has been a good place to be to read advice and seek your own and especially to know other people are going through similar things.
You might want to try posting on a separate thread so that people can follow you - might get "lost" in this one.
It does sound like your H is depressed. Mine is not acting particularly depressed most of the time though I am sure there is an element of it thrown in the mix so I don't know what advice to offer there.
As far as your upcoming anniversary goes, we just had ours last month and it was pretty rough. We didn't acknowledge it really other than to wish each other a happy anniversary but my H spent most of the day out and was clearly very upset and apologized more than once for putting me through this (I just wanted to say then DON'T). Maybe just play it by ear - it is still a few weeks off.
The other advice I can give is what so many have said to me and others and is the best advice there is under the circumstances - take care of yourself and your kids. Make sure you are eating, sleeping, exercising, etc. as best you can. Plan fun things to do with the kids. For me, prayer has been my biggest source of comfort, peace, and strength.
Hang in there and know you have support here. Keep us posted.:)