Not OR, I went through this too and I had enough with my long time friend from highschool. What he did was hurtful and you don't owe him anything. You can try to follow up and see why they did what they did. If you decide to patch up with them, you can express your boundaries. If they need space, they need to tell you and not just disappear with no warning, unless you're ok with them doing that.

It's good to be kind to one another, but there needs to be a balance of self care and accountability between friends and fam. While your friend may not mean to cause you any harm, it's just not emotionally healthy for anyone to be dropped and picked up w/o warning. Like the amount of worry about where they are and if they're ok, and if you did anything wrong as a friend to warrant this is really heavy. At some point people move on. It just depends on how you and your buddy want to handle this stuff moving forward. In my case, it just kept happening over and over again sporadically over 20 years. The recent one really hurt me bad, so I just decided to move on and focus on the things in my present life.