what will you do if the person you care the most throws you like a trash and choose someones friendship over you?

evaluate the situation first. I've been in, and have seen relationships (brother/sister, childhood friends, etc) where when one person starts to grow up and develop a wider social circle like dating or meeting new people, the other person suddenly feels as if they're getting pushed back when they're not. If I really was being pushed away, I'd either let it happen and cut my losses or confront them and let them know I feel left out.