I wrote a whole post about this the other day, but basically, I participated on a whim and tried to speed-run things since I only knew about the jam after 24 hours had passed. I'm just happy that I managed to finish it. Also, everyone's games are cool!
You probably didn't meet the requirement for other endings.
How about you focus on one type of activity (example: sport-related things if you want sporty bf)? And refrain from making him jealous by you-know-what ;)