Men, what makes you lose interest early when dating someone, even if you liked them at first?

I’m a 21F and I’m curious about what makes men lose interest in the early stages of dating. Sometimes things seem to be going well, then the energy changes or communication slows down. Is it usually something specific, like texting too much, moving too fast, lack of chemistry, or do guys sometimes just realize they’re not feeling it? I’d like honest advice from men about what early dating behaviors can accidentally push someone away.