Reddit mentions of The Wisdom of a Broken Heart: An Uncommon Guide to Healing, Insight, and Love

Just like what u/robertosnow said. This has been true for me too. At first I hated it when talking to people they'd say "well it's time to focus on yourself now", because I wanted / needed to talk about HIM and what is he thinking and how is he feeling and how can I make this pain stop.... so do it, vent about it. Let it out and FEEL the feelings. That's the way through it, that's how to make it slowly go away.

What I started doing is writing down all the stuff my friends would say in response (because some of it was really valuable advice which I just couldn't absorb at the time), and reading back over it a couple weeks later was a gold mine of insights - including into my own obsessive thoughts.

A book which has been invaluable to me is The Wisdom of a Broken Heart which was written after the author's own heartbreak, and is so understanding that you could start it right away even in the midst of your own fresh pain. It gives methods to quiet the anxious inner voices, how to keep your heart open despite the pain, how to connect with the wonderful stuff inside you - yes it's somewhat spiritual but certainly not religious (she's buddhist but nobody reading this book would need to believe in Buddhism). Really highly recommended.

And YES, you will get through this, YES it is going to get much much easier. There will be up and down days for weeks or months, but let yourself feel the feelings, work on taking really good care of yourself, and it definitely WILL get much better. Good luck! PM me if you want to.