BOSTON GLOBE — As the spring semester gets underway on campuses across the region, college mental health staff say they’re inundated with students seeking care — a sign that, though classes remain largely in person, the stressors caused by the pandemic over the past two years are far from gone. In recent months, many institutions have redoubled their efforts to meet the increased needs of students even as they’ve begun to shift their strategy away from a singular focus on therapy and towards an effort to help students form friendships and to foster a warmer, close-knit, and more supportive campus culture.