I have been dumped out of nowhere by "friends"

On friend running a walking club was freinds and I confided alot
until this weekend when she told me she was going to the walk
of a different day then on the calendar with her friend and she call sometime- i dropped out

then anothe group dumped me - i was always at the night
socials and brough food and tonic- then they said you can'
come to xmas party - and maybe you should another group
because we are just going to have lunches- I don't want
to go even if I could

So sad and beaten- what should Ido