Jealous girls🙄🙄

I have been friends with this guy for nearly a year, about a month ago he met this girl and they have been on a date. I speak to him frequently and I think she’s starting to get jealous (which I think is unfair as I have known him for longer and we are good friends) she is getting annoyed when I message him. There’s something about her that seems odd, she is getting so protective over him. What should I do?? Thanks❤️