due to circumstances in my life that have soiled my reputation, thus resulting in a loss of almost every friend i once had and certain things that i used to do that made me happy, i have grown a great fear of losing everything again if i am to make new friends and find new hobbies to do in the future, or even return to old hobbies. it often feels as if everyone that im not friends with anymore is out to get me, and wants nothing but my downfall. im so afraid to the point where its very hard to confide in others, in fear that they will see that im going through the worst time of my life and use it against me. i was never like this before. ive never been the type to battle with mental struggles or have major trauma in my life, but now more than ever, it is really taking a toll on me.
when im feeling really anxious about everyone else and feeling as if i cannot do what i want to in fear of it being taken from me again, what should i do to calm myself down? im usually able to calm myself down, but it can often take a few hours. whats worse is that the same worries from the day before come again the next day, no matter what.
for context, i am high school student. 
any advice with the little info i have presented here today would be appreciated.