is my professor hitting on me

i have a male professor and can’t tell if he is just being super nice or doing something else. he is known on campus to have dated a student of his right after graduation so it makes me suspicious. he is really nice to all his students, making jokes and talking to everyone, so I’m not sure if this is just what it is. unlike with other students, he has left me money without explanation one time with work I got back. he’s printed and given me a poem during his office hours, asked me personal questions during office hours, and ran after me as i was walking back home from class once after reading an essay in class that had me nervous to ‘check in on me’ and tell me how beautiful my work was. there is other stuff but from this, does it seem like his behavior is more than a just professor being nice. i can’t tell