Help! This guy I talk to might not be into me anymore?

Whoa at first it sounded like the same situation I'm in. I work with the Guy we've been to the movies and out to eat. Now he's been acting weird lately. Hardly texting me, not as much as he used to. Checks out girls in front of me And told his friend he can't just have one girl. I say drop the boy. Drama isn't worth it.