Why would a guy text me constantly and ask to meet up- but talk about other girls?

We are friends for a while. I’m always in a relationship. But he’s never had a girlfriend. I’m 28 he’s 22. But he text me daily. Always asking to see me. But will also tell me he saw pretty girls at school. And shows me pics of girls.
Why would a guy text me constantly and ask to meet up- but talk about other girls?
Post Opinion