I think for the time being, you need to so something strenous that will get your mind away from thinking so much about the brain chemicals, etc. Then maybe rent a movie (not a love story)but thriller or comedy......something to distract for a couple of hours. Throw yourself into planning the holidays. How will you decorate for Christmas, what will you cook, etc.
You will have these times that test you, but you can do this if you make your mind up that you are going to do the right thing......even if it means you'll never experience those PEA's again. That's the thing here......you are trying to figure out how to get them back. Just do what's right and stop trying to get the feelins.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!