Sounds like to me that you and your wife should make some dates for just the two of you. Get out of the house. There is bound to be something you would like to do together. Go out to eat, a movie, etc. You need to look for a hobby you would enjoy that would get you out of the house every once in a while, even if the scenery is boring to you. Skype and playing games with a 15 year old is not what you need to pull yourself out of the depressed state you seem to be in. Surely there is a time when you wife can watch the kids and let you get out. Take up walking, jogging or bike riding. Just suggestions.