my friend is acting different do they like me?

my friend suddenly called me pretty one day then following that day would like almost anything i posted on my notes or stories and started talking to me more than before and then again today she said you’re so beautiful but both times she has said it right when i turn my head or walk away but loud enough so i hear it ? this kinda thing doesn’t happen to me a lot so it confuses me .

i don’t know it’s probably nothing but , i do enjoy hanging out with her a lot this just confuses me im so bad at reading signals we are more like class friends than like really close and we sometimes just go hang out in library after class and chat she’s really easy to talk to and i think i like her a little bit .