help...

So basically my friends went away for this school trip for 3 days and my bestfriend went on it but I didn't want to go. So they all are back on Monday and like she has got all these new friends with people I don't really talk to and I try to like talk and get involved but I feel like everyone in the group just is like pushing me away. I feel a distance with my bestfriend at the moment and some of my other friends. Any advice would be appreciated just no nasty comments plz Xx plz helpppl!!