I had an affair... and I want my Fiancee back

[DBinSF]

Thanks, Sandi 2. Perhaps I should clarfiy my timeline.

April 2011 - Split with Ex1.
June 2012 - Posted on DB about getting Ex1 back. Was not successful. Definitely for the best.
July 2012 - Started dating woman who is now Ex2
August 2012 - Realized Sexual connection with Ex2 was not great.
Sept/Oct 2012 - Began non-sexual affair with woman I'd dated earlier in 2011. She was in an open marriage, thus seemed "emotional safe" from my perspective.
June 2013 - Have sex with OW for first time
Sept 2013 - Got caught emailing Ex1 by Ex2. Ex2 was not happy.
Feb 2013 - Got caught emailing other random women (not OW) by Ex2. She was very not happy and asked me to move out.
Feb 2014 - I entered intensive therapy.
Mar 2014 - I called it off for good with OW
Apr 2014 - OW emailing and texting me to get back together
May 4, 2014 - I write very strongly worded message to OW to ask her to leave me alone for good -- that I intended to marry my GF and that I never loved her (OW)
May 14, 2014 - OW prints out my email, writes a detailed and explicit cover letter, and mails them both to my GF.
May, 19, 2014 - GF opens letter from OW. Changes locks, and tells me she never wants to see me again. AKA - End of live as we know it.
May 30, 2014 - I'm back on DB.