Bethenny Frankel knows a good thing when she sees it. Instagram/BethennyFrankel “Just B” just got a plus one. Bethenny Frankel hard-launched her new boyfriend on Instagram this week, sharing a romantic skating rink snap with beau Shane L. Campbell , a Miami-based investment banker. Aside from happy wishes for the new couple, several of the “RHONY” legend’s followers commented asking Frankel about her outfit, which included high-rise Guess Jeans accessorized with a “B” initial ring and holographic roller skates . The high-low maven also included Amazon Essentials Tank Tops in her wardrobe breakdown, which are just over $12 for two — and have over 40,000 five-star reviews. Amazon Essentials Slim-Fit Scoop Neck Tank Top, 2-Pack Amazon The stretchy, cotton-blend ribbed fabric tops are perfect for layering or wearing alone, as Frankel does. They also come in so many colors that it’s easy to pick ones that suit you.…