Style Fan, those APC jeans look gorgeous, and perfect for your style! did you decide against the new dark denim Kamm Pants?
FWIW, I have a really hard time with modern boyfriend fits. To get the legs to look properly loose, I usually end up with a falling-down huge waist, a really square/blocky fit through the hips, or just pants that sit uncomfortably low (surgical scar on my abdomen means I don't want to wear a low rise, especially not belted -- way too uncomfortable). I do like a loose leg, not a skinny leg, but don't always want to wear wide-legs. My solution has been to shop vintage. Levi's 501s in particular work really well for me. You get a straight leg but tailored hips and waist, not sloppy. With a bit of hunting at thrift and consignment stores (and sometimes even eBay, now that I have a better sense of sizing), I find jeans for $10 - $50 that fit great without needing any additional alteration. YMMV, of course, but for my body and preferences that's been the best way to get a boyfriend-ish look. You might also search out models called "Mom Jeans" which are usually higher-waisted with a looser but still somewhat tapered leg. The Madewell Perfect Summer Jeans might also be worth a try.