am i unlovable

i have so many friends and such but im no one's first choice like i can count so many people i call my friends but im not sure how many of them will call me their friend, im everyone's choice but no ones first choice im someone people ask to go out when their other friends are busy or text me when their other friends don't im the one usually that texts first most of my friends don't even answer my texts im so tried of this. my therapist tells me to wait and my "right person will come" but im sick of waiting i don't wanna wait anymore why can't i just be someones best friend like i don't understand what am i doing wrong either im friendly im a positive person most of the time i don't even tell my friends my problems so they won't be bothered and they seem to have fun around me too but im no ones best friend what if my right person never comes? how much am i gonna wait for my right person? what if i die alone? when am i gonna be someones first choice? im sick of waiting and im losing patience