Hi and Welcome! I'm sorry you're dealing with all these issues. But it sounds like you're a very strong woman!
Is your PN caused totally by the dropped foot arch? Do you know for SURE that's the cause? I think first I'd want to be sure of the diagnosis, to see if something can be done. Have you ever seen a Neurosurgeon? Perhaps a visit with one would be a good idea -- take along all films & reports.
Are you taking medications for the PN? There are some pretty good ones out there to help with the tingling/numbness and also any pain that you may have, such as the burning-type pain we often get. You might ask your doctor about these meds and see what he has to say.
I wish you the very best!! I have to agree with Ginnie about your relationship problem. Your boyfriend sounds like a peach -- but an open and honest discussion needs to take place about the "what if's" just like Ginnie said. Take care and God bless. Hugs, Lee