Did he lose interest because I smothered him?

Guy was flirty with me when I invited him to a sports game. At the game, a week later, I kept initiating conversation with him. He wasn't flirty with me anymore during the game. I invited him to dinner with friends after, he came and I initiated conversation with him again, he talked a lot about himself but rarely asked questions about me. After dinner, I waved goodbye and smiled at him. He saw, but instead waved at everyone else and did not smile back. Why did he lose interest between the first time we flirted to the next time we hungout?
Did he lose interest because I smothered him?
Post Opinion