It is so great to have you as part of the forum and please, there are no rules here with regards to "heard it all before", if you would like to go into detail, please do, we are here to support you and to give you some comfort at this time in your life when I can hear you are feeling so very alone and so scared and just want a friend, you are not alone and we are here for you.
At 21 years old, you are still so young and do have your whole life ahead of you, I know this doesn't help now with the feeling of being so alone but I am wondering if you have some interests or hobbies that would see you be apart of some social groups that you could meet some new people with similar interests as you.
It is so very hard with being a young adult these days and there are so many expectations on life, "should" be doing this and "should" be doing that...what career and how much money and am I going to be successful...so much to think about. Seeing that you are young there is an amazing service called Kids Helpine on 1800 55 1800, it aims at supporting people under 25. They are so wonderful and it would be great to give them a call and to see how they can support you also. They are professionals and have some tools to manage these sorts of things.
We are here to talk and to support you through this Tanop so please share as much or as little as you feel comfortable with.
It is so very brave of you to reach out for support and I hope I have been able to help today.
Hugs to you Tanop and hope to chat soon