Of course!
1. Starting the second week of school, yeah, they'll start reliably every Friday at 6pm.
2. The BFF events rely on two things: the "talk about sex" option in their dorm room, and figuring out the quad party mystery, which you will if you just keep attending. The roommate's partner events have a specific trigger where you have to overhear them having sex first. The classroom harasser should show up now and then during class events mostly (I've increased the frequency of their stuff for the next update) but make sure you have Bad Situations turned on for them.
In general when I design storylines, I try to get them to kick off in a fairly natural or interesting way and then have events occur at a reasonable frequency... but this is pretty easy to get wrong, it turns out, so I often end up retuning them based on feedback.
3. The clinic has a little content if you pass out (due to hunger or exhaustion) and yeah, it'll be the home for birth control type stuff when that's in. The other two don't have any content yet, but there will be a major update related to frat houses and upperclassmen stuff sooner or later.