Don't get impatient. When you hardly spend time with the person it takes them longer to notice your actions, but trying to jump the gun and TELL them is not going to accomplish your goal of making them notice. In fact it's going to sound manipulative, self-serving, and in fact they may even find in it justification to support their decision to leave. That's not what you want, so be patient.
If your actions are for being noticed and for getting your spouse back, they are manipulative. If your actions are for you, then it really shouldn't matter if he notices or not, or when.
Interesting that your H noticed and commented when you pulled back. I think there's an opportunity there possibly, depending on your sitch, to express very mild surprise, "really? You moved out, and I am trying to respect your decision, move forward and heal. I wouldn't have thought you'd expect or want me to keep contacting you as if we were together." I wonder what the more experienced people would say to that.
When he comes toward you is when you can act caring and interested, without going overboard. Don't push it out to him when he clearly doesn't want it.
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.