Heya Health is Wealth,
I kind get where you are coming from so I will speak from what I experienced since I just graduated last week.
Honestly I wouldn't be able to say that my uni experience was the greatest and I didn't graduate with the degree I wanted (my uni is stupid by giving our degree classification 2 days before we graduate!) Since all of my friends seemed to do a lot better than me I honsetly didn't want to talk to anyone. I was rather depressed when I got my results to the point where I told my parents I didn't want to go. However my family were still pretty supportive and I mainly stayed with them for most of the day. That really helped me and so I don't regret going at all (and I really didn't want to go, I cried to my parents lol).
I have very few pictures with my friends but for me, friends come and go. It was easier going through the day speaking to as few people as possible.
I think it's a bit early to be thinking that you don't want to go but if your university has the option, you can graduate in abstena. I don't know what your relationship is with your family but if you have a good relationship with them and explain, you should be okay. I didn't really party much or go to my graduation ball, I just wanted to get the ceremony over and done with. Now it's done and it feels like it was a lifetime ago.
Advise: In the grand scheme of things it's a very small event so don't let it get to you now. I have always had issues getting close with people since I tend to be the "outsider looking in" but I didn't stop that from letting me go. I made sure to go in just for the ceremony (depending how yours works out) and then I went out to eat with family. If you don't make a big fuss, it won't be and you'll be fine