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

First post, yay! So this happened yesterday. I was in college with some friends after class and one of my friends went to the a blood drive the university was having and he got a free heart shaped stress ball. My friends and I being the immature 19 year-old teens we are, started to throw around the heart and saying that we were playing with my friend's heart. This is where the fuck up begins: My friend was saying a pun about how if we broke his heart we will be fucked. In my head I thought:"hey my friend's heart got played by this girl(let's call her Lily). Ima say a pun about that!" and I proudly said:"If Lily played with his heart and tore it up, why can't we do the same?!" The whole room went silent and my friends' facial expressions where blank. I apologized more than 1,000 times to my friend even though he said it was ok and I still feel bad about it.
<bot>: Was playing with heart shaped stress ball, friend makes heart breaking puns, thought mine was good and when I said it ended up being a low blow, feel like shit about it.