I feel excluded

I 19M want your opinion on this situation

I had a trio, lets name the 2 of them B and C

B is my rommie and C was living in seperate apartment

We used to make plans in first year and C used to say ki jab hostel aaunga tab ghumenge and shit

And he joined hostel and now they go to movies and some place ghumne ke liye and bc vo puchta bhi nhi hai 💀

Although i am friends with his group

He is a good friend but idk it seems confusing.

Last time mei usko bola bhi tha ki merko bhi le chala kr, kehta sirf hostel wale the and that was when he joined hostel i said chal koi na

Yk it feels bad

What should one even do in this situation?