Found out he’s getting married next month!

I’ve been in a relationship with a man who is somewhat younger than me for about seven months. I fell head over heels for him and I think especially because of the attention he paid me. I was tickled that a younger man would be interested in an older woman and I’ve never had that before. Things started out great and I felt more alive than I ever have in my life. We both eventually told each other we loved the other. I really envisioned a future where we’d be together. The past three months things started going downhill he became less communicative, less enthusiastic.. he even ghosted me a couple of times when we were supposed to meet up and then was like absent for a week or most both times and I never pressed for an explanation and the only one he gave me was that he had a lot going on, needed some alone time. And I know men sometimes do need that break so I gave him the benefit of the doubt. I knew he had been engaged before but he told me it was over and that he hated her and that they were not getting married. Well guess what yesterday I happen to find several wedding registries online for him and his supposed ex fiancé with a wedding date next month! I immediately started shaking uncontrollably and crying. I could not believe it! I put so much into this relationship, into him, and had such high hopes for our future. I am beyond devastated. I immediately texted him a screenshot with some words to the effect of now I know why you’ve been so withdrawn. His response to me was “Look, I don’t even know what I am doing in life right now.” WTF?! Basically I told him that if he went through with it he would be dead to me. Of course I also poured out my grief, my disbelief, and my hurt To which I got no response. He either doesn’t care where he’s buried his head in the sand because he doesn’t know what to say to my reaction. I mean I was going to find out sooner or later. Especially with so many public registries that immediately come up when you Google his name. At any rate I am devastated completely devastated. I trusted him I put so much into our relationship and I had faith in him and I am so deeply hurt I can’t even put it into words. And I have nobody to talk to about it at all which is the hardest thing going through this shell shock in grief and not being able to confide in anybody. I would love some sympathetic ears, advice, shoulders.