Welcome and kudos to you for addressing your depression head on. Good to hear you are finding happiness in the process.
In an ideal world where two people want to work on a marriage, yes, being attentive to your partner is the way to better yourself and your relationship. My understanding from what you have written is that your wife asked for space, expresses confusion about what she wants in the relationship, has stopped returning the phrase “I love you” and most recently, is in no rush to complete the marital assignment given by the counselor.
It takes two to tango. Not so attractive to drag your partner through the dance.
Me 41, H 47, M 15 yrs, S11, S13 BD 1: 11/4/14 we work on it; really I pretzel myself BD 2: 3/31/15 H goes down to "dorm room" 8/15: H back to MBR 10/15: H back in dorm room 1/18: H files, now divorced