Didn't end as expected

Storytime:

A couple of years ago, one night, I was about to propose to my girlfriend when my roommate Joseph barged into the room out of nowhere, tripped and fell over, breaking a glass table with his face. Totally ruined the mood. Now, I didn't know Joseph THAT well, don't even remember where he was from, but let' just say I put my plans on hold to help him through his injuries.

Joseph had gotten a big glass shard in his eye, making him completely blind in that eye. He was walking around with one of those cotton pads on his eye for a couple of months. Then suddenly, he disappeared, along with my girlfriend

Apparently they'd bonded during the time after his injuries, and eloped together , left me behind without as much as a note. I tried to track them down, but never could.

In conclusion, if it hadn't been for cotton eye Joe, I'd have been married a long time ago. Where did you come from, where did you go? Where did you come from, cotton eye Joe?