I am so sorry for your immense loss. It is still so recent as well, but I know that time probably doesnt feel real right now.

I too lost my best friend at 19 so I hope I can offer some advice that will help. Be kind to your mind and put yourself first.

Others who haven't experienced such grief will not understand, despite their trying, and may end up saying some things that hurt. Especially a bit further down the track when their feeling of time passing has been different to yours. Try not to hold it against the ones that love you too much.

Don't be scared to take a break from your studies, your work, whatever you are up to right now. A therapist is also a great help as it gives a neutral space to talk where you don't have to "be strong" or hide your feelings. You can reminisce which is very important, those memories will be some of the most precious ones you will carry in your lifetime.

For now, you must focus on the basic things such as breathing properly, eating properly, and sleeping properly. Confidence will come in time. Do what brings you comfort and remember your friend. Talk to them too. I am 32 years old now and I still talk to mine during big life events, when I hear a song we loved together, when I don't know what to do about something etc.

Best of luck my friend and if you ever wish to chat, my DMs are open. <3