both thinking that you need someone to live and thinking that you don’t need anyone to live is straight up stupid. 
after being so dependent on people for a good few years i flipped to the other extreme and adopted the mentality that i needed no one except myself. and that IS true to a certain extent. 
but as a rule of living, it downplayed the importance of my existing relationships to me, and i went into junior year seeing all my friends as disposable. 
it took a whole year to stop taking them for granted and realise that they were genuine friends who cared about me and helped me in their own way if ever i asked for help. it took another whole year to realise that friendships in itself are an important thing. the realisation actually came when i completed high school and had nothing left to do and i was sitting in front of my huge closet looking at all the stuff id bought over the past 2 years to “reinvent” myself. and i just realised that i had every material thing a stereotypical teenage girl could want but i just wanted to hang out with my friends again. this is some care bear friendship shit but its something i learned even if its cliche and really not groundbreaking.