J.S.
Have boyfriend press his thumb into the knot. It'll be painful, but it'll be a weird ticklish pain that you can grit your teeth through after the first shock.
Pressing directly on the knot gets it to loosen.
You can try ice - that always gives me 3-4 hours of pain free mobility.
Stretching takes a few days to a week.
But pressing right on the sucker - takes the knot pain from a 10 to a 3 in a matter of minutes. Just grin and bear the initial shock of pain and you'll see what I'm talking about.
You can even try it yourself if you can reach...