Your W's timeline was longer than yours going back in the past. She took as much time as she needed to gear up before telling you, so she was miserable for plenty long before you started on BD.
Your grieving is also going to take longer because of checking her FB, and because you feel what happened wasn't fair. If you let go of judgment and just accept what IS, you will heal faster and better, and you will be right there, in the moment, if she drifted back to you later on. Holding for dear life onto your "stuff" over this, is going to hold you back now and later.
Adinva 51, S20, S18 M24 total 6/15/11-12/1/12 From IDLY to H moving out 9/15/15-3/7/17 From negotiating SA to final D at age 50 5/8/17-now: New relationship with an old friend __ Happiness is a warm puppy.