After break up, what is going on his mind?

We had been together only for one month and we broke up 2 weeks ago.
Even though I tried to stay in this relationship, he wanted to walk away and was bored most of time with me. I was just too busy with school and work. I felt like he was impatient.
But when I asked him " you dont wanna see me anymore?" twice, he said "I don't know."
He said we are just not compatible.
After then, I just haven't contacted with him for 2 weeks and I will contact agian after this semester is done.

And I saw one post which he pushed like button on fb today1
The picture said "If you work hard enough you can replace depression with exhaustion"
Can I assume what is going on his mind for that?
I just want to believe that he is missing me at least a little bit.
After break up, what is going on his mind?
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