Ghosting..

I feel like my long distance boyfriend of over a year is fading out of my life. When I try to talk about issues he always blames me and then I end up shutting down from being upset and basically accept blame. Our relationship has turned toxic I feel. All of a sudden he's taking trips with people I've never heard of, taking days to text me back, I feel like there is another woman.

I'm an adult and want to act like an adult and break off the relationship the right way but with him refusing to really talk to me it's hard to do that. Should I just say my goodbye, block his number and move on?