There's a HUGE Deaf community in and around Boston. I'm sure it'll be easy to find something. I see you're in Framingham....I would check with DEAF Inc. and the Learning Center for Deaf Children for the best info.
There is quite some place for you to learn asl , You may learn asl at TLC or N.U. in Boston but I highly recommend to go TLC and find out more information and I am sure they have ASL tutor to help you out.
You could post a request for a deaf tutor on the following sites:
You can find more tutoring resources at my geocities website
with the following URLS:
IDIC: Infinite Diversity
in Infinite Combinations