Why Does Everyone Expect To Be Approached?

Throughout my life especially during my teenage years and also as an adult i notice people are incredibly reluctant to add others to theur group. Its as if they are expecting you to match every criteria of theirs.

Not only women but it also applies to them as well. Its just very dissapointing and discouraging when i think about it. No one wants to be my friend and idk why. I have nothing to look forward to after college or anything. Idk how to approach either as i cant pretend to be someone im not. I cant pretend to have a clue with women or with mutual friends. I just have no idea how it works. I used to be social as a child but now it feels harder than the work i have in college....

Thank you for reading