How harmful is self-deception?

(Post from myspace):"The psychologist told me that my self-deception about life and fixation on 2013 is most likely due to the fact that I can't cope with my current problems and psychological state, so I seek refuge in those years when everything was carefree and good. I'm living in the past, and according to him, that's certainly not a good thing. But I will say in advance that I have already stopped my struggle between 2013 and 2024, because a few months ago it brought me to the point where I attempted suicide.
One day one of the tests asked, “Do u engage in self-deception?”.
I answered no, but now I'm saying YES, YES, YES and YES again!
I AM A SELF-DECEIVER, I LIVE IN AN ILLUSION"

But now, alas, it has become out of bounds. I'm confused about a lot of things and I can't really tell where is fiction and where is reality..

Please don't criticize me. I'm so drunk and I'm scared : /