Older Woman, Younger Man

I'm 52 and have been single for six years now. When I first got divorced, I threw myself into work and never really dated again. Then one day, a younger man at my gym started talking to me. He was all charm and compliments. We clicked over the phone calls and text messages. Finally, he asked me out on a date. It felt amazing at first, the attention, the excitement. But when we hooked up for real, it just wasn't what I expected. Maybe it's too much pressure because of our age difference? Maybe I'm being overly sensitive? What if this is all normal? Should I keep seeing him or tell him it isn’t working out?