that's so sweet of her, and especially if he already knows about her history, i think he'd initially be hurt by an abrupt ending but ultimately understand how it came to happen. he's easygoing enough, so there never would've been any pressure from his end, but obviously that doesn't mean there would've been no reason for her to wake up one day like shit, what's happening? and slowly start to break things down. at this point, though, he'd be open to being on good terms with her. no need to be spiteful just because they're no longer dating, right? he'd always make a point to ask how she was doing and genuinely hope she's happy/content/enjoying her life/etc.
i also...literally just remembered, because i am the worst, that ben's father passed away in the spring of 2015. so i think he also would've empathized with her grief in whatever way he could, knowing that there's a difference between losing a parent and losing a spouse.