So sorry for this development, but try not to get too down over it, often broken relationships don't start to mend until after a separation. I think in our case it was what W and I both needed to gather our thoughts and do some soul-searching. You mentioned your lack of confidence, I had very little confidence going into the S but once W moved out I quickly learned I could do just fine on my own and it boosted my confidence in a big way. So you may find things get a lot better after S.