I think being associated with negative people every day will affect a person, just as being around bubbly people kind of rubs off too. Having to share each day with a co-worker who sees everything in a dark way, sure doesn't help.
I don't mean to sound like I'm pushing prescriptions, but I know from experience that when you have clinical depression it feels like life is constantly an uphill battle and it's difficult to see the bright side. Some people do not recognize that they have a type of depression, so please see a doctor. If you get the right AD for you, it will make a world of difference, but sometimes it takes several tries before you find what works on you the best.
Other things, like what Coach suggested, is very good and should be done whether you get medical help or not.
Living with a person who is always negative is a draining and tiring chore. Your S gets little joy out of being M to you if you aren't much fun to be around, right?
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!
