SOMERVILLE — There have long been homeless people in Davis Square. But this summer, neighbors with and without homes agree, something was different. A rise in unsheltered homelessness here, mainly in two parks near the MBTA stop, was hard to ignore, as were reports of open drug use and drug dealing, discarded needles, and violence […] The post ‘I’ve seen things I can’t believe’: As homeless population surges in Davis Square, Somerville grapples with response appeared first on Boston.com.