I know people that have Primary Raynaud's (which is what sounds like your boyfriend has) that have had it for years and not sick with anything else.
My Raynaud's, Secondary Raynaud's, came about more suddenly as my first symptom of being really sick with SD, RA, Lyme….and the list goes on. Surely, there is a connection with Raynaud's and hypercoagulation (thick blood). Mine is almost totally gone with the use of enzymes and sauna because my blood is becoming more normal in viscosity. Bacteria love to hide in that thick, sticky blood so worth paying attention to.
Take care……kim