Friends

This isn’t necessarily a love relationship but a friendship. I need to talk to someone because the two friends I have, I don’t believe are my friends anymore. A quick back story, one friend ( friend A) I have been friends with since Kindergarten, we were 5 I’m now 20. The other (friend B) has been friends with friend A since elementary school (primary school), since they were 6-7. friend A and myself didn’t got to elementary school together. We all went so high school together and we all became close when we were like 15. Overtime I always felt like the third wheel but I brushed past it. Ever since we finished school it’s definitely changed our friendship we were all so close and now I am basically the one making the effort to talk to each friend, seeing how they’re going. But they never reach out to me. I would try and organise catch ups with Friend A and she would always say how busy she is with work and all that. But in the mean time she would catch up with Friend B. This has happened on numerous occasions. On a rare occasions we would have a get together with some other friends, Friend A and B would discuss things that I have no idea about and so I ask. And they just continue to talk about it even though I messaged them they never mention anything like what they are talking about with each other. As well as this, whenever friend A or B say they are busy when I message them, a few days later I see that they have caught up with one another. I have made sure I have tried to talk to them but I just found I never got anything in return. I stopped reaching out and now haven’t spoken to them nor they haven’t spoken to me in two months. Numerous other things have happened, but I would be here all day. What should I do? I’ve given up on making an effort.