I'm used to rejections but is it surprising one specific rejection really hurt me?

I'm not new to rejections. I've gotten rejected by classmates in my early school years (bullied too), rejected by my HS crush, rejected by the University I wanted, rejected for a promotion (eventually I quitted the job and created my business), rejected by my own maternal grandparents, rejected at a party, etc.

Yet none of those rejections managed to deeply sear into my memory as this one; getting declined by my then girlfriend 4 years ago. I remained silent for the longest, frozen for god know how many minutes, opened the door and walked away from her life. I've never been hurt by a rejection before. That one got me. That's the only one I couldn't recover from easily.

Isn't that shocking how one specific rejection hurt me?

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That's the irony. I always had a ''so what, big deal'' attitude, nothing would hurt me and I would be bouncing back up in no time but that specific decline got me. I had no comeback for that one.
I'm used to rejections but is it surprising one specific rejection really hurt me?
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