Loved a M who loved bombed me for 3 months then the nightmare began

I’ve been in a relationship with an older men for 3 months (13years gap)
He was incredible connection wise and we were deadly in love (or so I thought)
He started acting a tad strange and I went back to the app I met him on and surprisingly he was still on there.
I messaged him and we had a convo where he was pretty explicit about his singlehood and the people he was sleeping with and such.
I called him ended the relationship by explaining that it was me he was talking to on the app.
He didn’t even have the human decency to say sorry- instead he said you tricked me and ok.
I am having a hard time getting over the intense feeling. We spoke 24/7. Everything seemed amazing. I just don’t understand.
He never reached out again and I am forcing myself