I feel like im being pushed out of my circle of friends..?

i have a good group of friends, but lately its been expanding and more people have been hanging out without me. it started off with like 5 close friends to now like 10. a few months ago, we all went out for brunch and i got pushed down the table and sat on the end while everyone else was laughing on the other side. recently, they had a softball game and invited eachother andonly i was invited last minute...now they asked me to hang on monday with the "posse" but fear being pushed out again.. it hurts to be alone....everyone doesnt' care about me anymore, it seems. none of the girls text me anymore besides creepy guys that like me. i feel alone...wat happened?