Haha, especially this season :P One or two I could see, I guess...ish. I mean, Matt and Carlotta, maybe a bit, but more so because Matt is a grownup in high school, really--he's already dealing with adult responsibilities, and he's just trying to catch up with himself, so it was buyable (if, you know, not for the fact that she was employed under his roof, but that's tv). But Julie/the teacher--seriously, and the *ethical* issues, on top of the gross maturity difference between the two; and Tim/the Neighbour, who has a *kid*, and who ended up dating Billy (because that situation wasn't screwed up enough, srsly). S2 fnl seemed to get a little...sidetracked, though. Hopefully these issues and others will be more settled next season.
Re: long review, pt. 2 (aka. I need to learn how to shut up)