I think you've put too much effort into this fabulous game, tsk, tsk. Years of playing dating sims with only one event per location have left us poor players unprepared for this sudden flood of options. XD
Seriously, though, there's also a tendency in games to 'level up' - you chat with them to get their phone number, then you call them and chat to get up to lover, then you're lovers and you go on dates. Usually you don't go back to the earlier stages once the new ones are unlocked, so that might lead some people (er, me) to think of daytime things as less important.
Maybe a message popping up after their first time reminding people that a good relationship involves more than just dates? Or a sulky love interest pointing out that you never see them anymore for anything except sex, since god knows that's what would happen in real life. ^_^ Or actually, what about the star system used until you become lovers? That could empty out and track event progression afterwards, to nudge people that there's something they should be doing.
I'm not 100% sure you need anything, but if you do, I'm sure you'll come up with something awesome.
...this reply got way too long, sorry. Can you tell I love your game? The voiced version is going to be the cause of death at my autopsy.