Theres a small pond down the street from my house ive been fishing since i was ten.  The way I usually get there to fish i have to walk across this guys property.  Recently he has asked me not to walk across his property.  However there is now no other way to access this pond other than crossing private property.  It is not a private pond but it seems that there is now no public access to fish there that i know about and the fishing is pretty good.  Who can i contact in my town or maybe the MA fisheries department to find out about a right of way or some such to access this pond?

Try knockin' on the doors of some of the other property owners. Be nice, ask permission and see what happens.