Dear Allison,
I recently had a very similar situation to yours.
After mine abruptly ended, he did not pay any focus to me at all. I felt like I never existed. I felt every single feeling that you described in your post. I spent weeks after dwelling over all the unanswered questions. However, at that point of time I did not see that I was not going to receive those answers while being a total crying mess.
One day, I got really fed up of constantly wondering and crying. I told myself that this is unfair, but in reality I was being unfair to myself. I was stopping my life and my happiness for a person who clearly does not want to communicate. I have learned that at this time, they are dealing with just as much that we cannot see. The more they push us away, the more energy they are putting into us. It is not our job to fix or understand them when they are not ready. However, what we can do is continue to live life. Remind ourselves how grateful we are. Surround yourself with friends and laughter. Be the most amazing version of yourself.
I hope your doing well 🙂