I never see rugby games on TV. I live in Boston so I do not have the British channels that always have it on. How can I watch and follow rugby while living in the US?

You need a specialty sports channel in the US. Fox Soccer Plus has what is probably the best overall coverage in that country, but Universal (NBC) Sports also has some, as does BBC America. Living in New England, you might also have access to some Canadian channels. If this is the case, then Sportsnet World has very good coverage.