Life and friends

I don't know why but I feel like I growing apart from some of my friends and I can't put my finger on it. Like things just don't feel the same anymore, everyone's in relationships and just seem to be slipping away. The thing that makes it feel worse is that it seems like they're just letting it happen and I just feel unincluded at times. Idk maybe this is just an awkward adjustment phase but I really wish it would come to an end, I miss last summer when the fun was endless. Maybe I do need some therapy again idk.