Got heartbroken again and I(23M) feel okay?

Just to preface this, I am extremely sad, it just kinda feels off?

I knew her for quite a while, and we always flirted with each other from time to time, the rest I can’t tell because that would be invading her privacy

We got together early last month, and we were happy with how things were going, but because of some circustances she felt uncomfortable with how fast things were going, so this morning she told me that she couldn’t do it anymore

It hurts, it hurts a lot, but I seemed to accept this sadness too easily, and it frightens me that it feels kinda comfortable being miserable.

Idk, I just may be depressed, but I still am going to work tomorrow like nothing ever happened, represing all this sadness because what else can I do?