Many colleges have theatre or performance departments. Among the best, by specialty are:
Musical Theatre: http://musicschoolcentral.com/discover-the-10-best-colleges-for-musical-theater/
In Boston, you have many great options -- Boston Conservatory, Emerson College, Boston University, Brandeis -- all great schools for performers. You can major in Acting or Performance Studies, but truly, anything you study that helps you to grow as a person will add to your performance skills.