You may also consider thinking about your passions and values, and finding people who share them. Even if they are not exactly intellectual peers, at least there will be commonalities, which is one place to start from, and in the course of pursuing interests about which you care deeply, I suspect you will be more likely to encounter people with whom you connect on other levels as well.
And I would echo aquinas's suggestions: you are in Boston, which is particularly rich in universities, almost all of which host lectures open to the public which are highly likely to attract some people with whom you might find common ground. Obviously, MIT and Harvard are there, but many of the other universities, hospitals, research institutes, museums, and professional societies also host community events (mostly virtual, right now, naturally) that may interest both you and people with whom you would connect.
