I am 26 years old and I will quickly mention that I have had a long 15 years of depression and insecurity, and other things in my head that I won't describe now

Since I have been about 12, when i have dreams, they are not necessarily scary or nightmares in the obvious way. But even if something nice is happening, which is rare with me, there is this weird atmosphere around me, like everyone AND evrything...... for example even the walls in a house....is against me. I will try to describe the feeling: For example, Even when I am having a dream set in my house, or at work....places that I go to when I am awake.....Its a feeling like, I can sense that everything that I am afraid of in the real world , have a physical form in my dreams, but are invisible, yet surrounding me. Also the atmopshere has a dead, decaying , sinister and hateful feel towards me, that I am in a place where I don't feel right. Its a place where I don't want to be....even if the places in the dream, like cities that I love like New York....is in the dream... its weird

cheers

If its ok I would like to have more discussion about this in this thread

Most of us here are not qualified psychologists, psychiatrists or other mental health professionals. Perhaps those who are can comment more exhaustively. All I am comfortable saying to you right now is that your dreaming psyche seems to mirror your waking psyche. Speaking from my own life experience, "insecurity" always involves a strong element of fear. (Why would we be insecure if we weren't afraid of something?)
Add depression and "other problems", and that element is bound to get stronger.

I agree with Bob. It seems like your dreams are taking the feelings associated with depression and putting them in a more concrete form.