Bf doing a piano duet with another girl?

Do me and my bf are long distance. We don’t see each other that much and plus we both have strict parents. All my friends at school know abt our relationship.

I go to an all girls private school and he goes to our brother school, so sometimes we have stuff together.

This year, there is this combine orchestra being hosted by his school. It includes his school, my school and a bunch of other same-sex private schools. I’m not in it (it’s optional for people in orchestras), but my friend showed me the email and turns out my bf is doing a Mozart piano duet with this other girl . The other girl is the same year as us and she goes to another all girls school.

I’m not sure how to feel abt this because they perform in October and he sees her every Thursday for rehearsal, plus they would have to work together since they’re the soloists for the Mozart piece. I haven’t seen him in real life since last year

Maybe I’m just paranoid but I don’t know what to think. He doesn’t text much, He hasn’t texted me in 4 weeks. He also has not told me he is in the combined orchestra.

What do u guys think?? Am I overreacting