[user104658]

As hard as it might sound, you should try to develop a social circle outwith your relationship. As Withano says, depression and chronic anxiety are becoming increasingly common and I personally fully believe that the main reason for this is that human beings are naturally intensely social creatures and, despite things like "social networking", we are becoming more and more isolated in everyday life. What you're feeling doesn't make you broken or abnormal... it is completely normal... we are not supposed to be living like this. Try to find a way to make real, meaningful human connections. It's vital, if not necessarily easy, especially if you've already found yourself on a dark path.