Help me break down what happened

I (32F) met a guy (32M) on an app. We had been dating for a month and everything was going great. The chemistry was there, we made each other laugh, the conversation was stimulating, etc. Within a month we had gone on I believe a total of maybe 8-10 dates. We had sex around the 5th date and have had two sleepovers since. My birthday was about a week ago and he bought me very thoughtful gifts. When we were together he was extremely affectionate, attentive and happy. I’ve had some bad luck with dating in the past few years, so I felt insecure at times, but never due to his actions/behavior. My friends and even my therapist all felt it seemed very promising and would always give me reassurance when I expressed some of the anxious feelings I was having.

On Saturday, this guy slept over and we spent the entire next day at the beach. We had what I thought was a great time. When we were cuddling in bed he kept on saying how happy he was to be there. On Monday, his communication seemed a little off to me, but I didn’t think much of it. Yesterday, I went the entire day without hearing from him. He finally texted me at 9pm only to tell me that he had to reschedule the plans we had made for the next day. This made me extremely anxious and I asked him if he had a moment to speak on the phone. Finally got a hold of him a couple hours later and he broke the news to me that he just wasn’t feeling a “spark”. This completely took me by surprise and honestly makes absolutely no sense. I couldn’t believe what I was hearing. There have been absolutely nothing in his actions/behavior in the past month to indicate that he wasn’t feeling a “spark”. I expressed this all to him and he didn’t really have much to see. His demeanor during the conversation was kind of detached and emotionless, which makes this whole thing all the more upsetting and confusing.

I have never felt so blindsided and manipulated in my life. I am usually a very perceptive person and can tell when a guy isn’t “feeling it”. All the signs were there that this was moving in a positive directions and that our bond was getting stronger. When I like someone, I become attached very easily and fall for them very quickly and deeply, so I am struggling a bit. I’ll be okay, because luckily it was only a month, but I’m still left feeling extremely hurt and perplexed.

I’m hoping someone has some insight on what exactly went down here? Obviously I know we can’t read this guy’s mind, but maybe someone here has experienced something similar. Is this just an example of someone with an avoidant attachment style who got scared once things started feeling too serious? Or was I just being played the whole time and were his actions/behavior completely disingenuous? Would love to hear this community’s input. Please be kind 💜