Hey Tetra :)
Welcome to the forums :) Thank you for having the courage to share. If you ever feel like you need someone to talk to, I will make sure I continue to check this thread :). I hope that you are comfortable enough to share here!
That sucks that this is happening. It's unfortunate that your friend does this, and you feel like you can't talk to him. Unfortunately, this seems to be the case with a lot of relationships with people our age.
For now, I would recommend seeing a counsellor. Most universities offer free counselling services with 6-10 sessions per year. I recommend the counselling sessions to everyone, even if they are not feeling any stress- simply because I think it is that beneficial. A counsellor can offer you another human to interact with and can provide you with a plan of action to begin the reversal of these negative feelings. In the past, university counsellors have helped me immensely, and I still see one currently.
In the meantime, do you have any hobbies that you enjoy doing? Usually, in periods like this (especially if it is university holidays), I like to distract myself with things I enjoy doing.
Finally, as a starting point to combat social anxiety, I would highly recommend the mindfulness resources on the front page of the Beyond Blue website. I suffered from pretty bad social anxiety in the past, and mindfulness is how I cope.
I hope this has been helpful, and I would love to hear thoughts! (if you feel like it)
Nice to meet you :)