Feeling like a bad friend

So I try my best to be a good friend, but I clearly am not. Very few friends from high school I am still in contact with. (Over five years). I've been living in a new area for about 3 years. Recently I've had some friends who have become more distant, or ones I've introduced to each other hanging out more often and less with me. Yesterday one of them had told me how their family was visiting from out of town and they couldn't have anyone over cause they wanted to just do some laid back stuff. Then a bunch of my friends are together and posting photos on social media. They clearly didn't want to hang out with me and seem to be hanging out more and more often with out me. How do I tell if I am a good friend? Or is this just a normal part of aging?

Sorry, I'm not quite clear here: these people who excluded you...Are they your old high school friends or the new-ish friends from the new-ish area?

dear friend i think u should stop thinking about this and should start being more casual with guys try to confide with them about darkest incident of your life . try to be cool along with them and often try to have fun if they mock u just laugh along with them and then pinch there asses by making fun of them but picking one by one. try to being close with one of the coolest guy . and most important less think and fun more

(Que?)