<human>: Condense the text into a few key points

I'll start:

When my first GF broke up with me in high school (I was quite the "nice guy" then and it came unexpectedly near my birthday) I didn't exactly get the hint and continued trying to tell her about the good times we had on MSN/email for about 3 days, to the point that she had to block me. 

She ended the conversation with "people come and go - GET OVER IT!" and I spent the next 2 days reading our old MSN conversations from happier times while sobbing to myself, searching for one particular conversation where she had told me that she'd always talk to me no matter what. Clearly, I was quite the player.

But the definitive cringe-moment of my life came when I followed up my MSN obsessiveness by randomly breaking down and crying while watching a movie in a history class the next day, and then walking with her down the hallway in school and continually bawling until one of her friends dragged me off to the side. She, on the other hand, was quite detached from all this (her reason for breaking up with me was that I was too clingy - which I was).

I followed THAT with more MSN conversations/emails professing my love, including one that told her that I saw her mom and sister walking and how much I miss her stories about them.

...let's just say I've grown a lot since then. Still hilarious looking back though.
<bot>: GF broke up with me for being clingy. I responded by clinging on to her for dear life, which included stalking our MSN conversations and crying hysterically at school.