LEFT OUT

hi, just asking for some advice and perspective on my current situation. I belong in a trio and recently got left out again. Its both tiring and stressing me out, its the 3rd time already, and i repeatedly told them that i HATE the feeling of being left out. I just feel like they don't even want to hangout with me no more. Its like there's a duo in a friendship that made me feel unwanted. What made me infuriated more is that one of them lied to me about it, ITS EASIER TO TELL THE TRUTH YOU KNOW. What hurts about it is that if hadn't known, i still would be smiling like a fool i was. I'm starting to doubt myself, what if im toxic for feeling like this, its not like i own them or something. Its just that i always make much effort trying to include everyone, when it's easy for them to exclude me. Maybe i should've lowered my expectations. Maybe i am just too sensitive. I just wanted them to value me like i value them. Perhaps invite me or something even if you know i wouldn't make it or go, ITS THE THOUGHT.

I need help i don't know what to do, i do appreciate assurances but i need something logical to put my mind into ease right now.