After a month of so many dresses, it's kind of funny that this week's most-pinned look on my Outfit ideas for ageless style Pinterest board involves jeans, because it's been so cold in San Francisco lately, that's all that I've been wearing! I can see why this one is popular, though: it's a summery spin on one of the most classic outfits out there, a white shirt and jeans. Since the original image came from Instagram, I was able to find most of the exact items this woman was wearing, but…