Yep, I think both the tears of my DD and mine were not of sadness just a whole lot of different emotions pooling up. I'm not a cryier and neither is she, we are both pretty stoic. But nothing makes me loose it more than someone else's tears. My Dad passed just before Fathers Day. I made it through that all that goes with it. My Sis read his Eulogy. She got choked up, tears. (she is a tough cookie and quite the attorney, she doesn't loose it often) Again me with tears for her loosing it. With my DD we were both fine in 15 minutes.
It gets harder to go back and forth too once you are in courses for your major. There were times my DD came home more frequently and others the workload didn't allow for it. Will your boyfriend also be attending Boston?