Boyfriend acting very strange...think he's cheating

My boyfriend and I came back from a small trip in which we had some serious arguments. Fast foward from the moment we got back he started ghosting me, ignoring my msgs, out 24/7, calling back when he feels like it. He says he normal, nothing has changed. But I feel as if he's cheating. I've spoken to him about breaking up because I feel as if he doesn't want to be here anymore and he says he doesn't want to break up.

I dont know anything about him since I got back! Nothing. He msgs me once a day and calls me about once a day for about 2 mins. This isn't a relationship.

I feel as if this is making me go crazy, making scenarios in my head that he's cheating and with another woman or his babymomma.

Am I crazy? I know I'm not the only one that would think wrong with the sudden change the moment we landed from the plane....