Secret hoarding shame

I'm a hoarder, my house is full of things, rubbish, old clothes... It's an absolute mess but I cannot bring myself to get rid of anything and I always bring more things to my house. 
It's affecting my life. It affects new relationships I have as in too embarrassed to show anyone my house, I dream about going home and my room has been tidied and I wake up with a huge dread because it looks a disaster.  I don't know what to do.
It's much more than just being a messy person and having lots of things. I even feel too embarrassed to throw anything away in case people see the amount of things I'm putting in the rubbish. I'm at my wits end.
Anyone know what I can do??? I don't think this is an issue for the dr to solve, I just want to know how I can get over this fear of getting rid of my belongings.