How did I lose my social energy so fast?

I used to be one of the most popular guys in my first semester, almost like a cheerleader. Everyone wanted to spend time with me and I could talk to anyone without any problem. But now I feel like I’m boring to people. Maybe it’s just my overthinking, but when I try to talk to someone or spend time with them, I can’t continue for more than five minutes. I start feeling bored and I feel like they don’t want to continue with me. I don’t know what happened to my life. Has anyone experienced anything like this?