I know this is an old post, but I hope you still find this response. The depression you're experiencing seems similar to the one I once experienced years ago. I had a lot of difficulty making small decisions and I was almost always hard on myself. I would always second guess anything I did and I had little to no confidence in whatever decision I stuck with. This would apply to small things in my life as well as bigger things such as relationships, and depression can severely affect relationships with significant others, friends, family, and a number of other people.
You need to get some professional help with the depression and anxiety. Try finding a cognitive behavioral therapist that specializes in whatever you're experiencing, and you can also try finding a psychiatrist that can help prescribe some medication to assist you as well (although you don't have to use medication and it's 100% your choice). They can both give you the advice you need to recover form depression and anxiety.
Again, I'm sorry if this is a late reply; but I hope you can read this and I hope it at least provides some help.