I overthink everything. It's mainly my relationship with my 3 year partner, who I'm about to marry, so there's no signs he's leaving, which I'm conscious of most of the time. 99.9% of my problems/struggles in life feels like it leads back to my fear of abandonment. 

It got a tiny bit better for a while, but my constant need for reassurance and validation from my partner takes over my life entirely. Me thinking he will leave and constantly nagging will just push him away, and I know that. He's so patient, but I know even I could freak out over this if I was in his shoes. 

I constantly feel triggered by things that sometimes aren't even really happening...

Are there any tips? I can barely sleep thinking he'll randomly decide he needs something different from me. It's been a few weeks since this started happening so constant and rampant again.