Congrats on both! Im an MA native and lived in Boston for 8 years. The city is diverse in a sense, lots of different areas with multitude of cultures. Majority of the culture though is in the suburbs of the city, not in the center etc. Very easy to travel around Boston due to its transit system so a car wouldn't be necessary unless youre planning on living far outside of the city. Otherwise Boston is a very fun place, moving back there from SD because of how much I miss it.
I graduated from BU undergrad and had some friends in the PT program. My major was in the same school as the PT program so a lot of our classes overlapped. The undergrad portions were very difficult, cannot say for certain on how the grad/PT class difficulty would be.