people change and sometimes they hurt us

some people just try too hard to be accepted in some circle. and sometimes,in condition to make it happen,they'll change their self into someone they aren't used to be.
now let say those people who used to hang out with you,are changing into people you hardly known, and maybe their behaviour is basicaly turned into something that is so-not-you.
Just an example, if they talk about someone's weakness behind his/her back and u dont have any problems with him/her,are u going to jump into the convo and laugh about his/her deficiency as well?
you might be a little bit trapped in there. you cought somewhere that you could just lose your friends if u dont do what they do. You might left alone.But then,you will see who's your real friends are,cus no matter what,real friends won't ever leave you for being who you are. and if you figured that the person once you thought is your real friend but actually not,it's okay, cus people change,and sometimes they hurt us.
You just need to decide who are those people who worth the pain.