Let that knot unravel and revel in the good you did!!! NO response... kudos.
You behavior is becoming unpredictable... you are taking steps to behave in a matter that is 180degrees. As hard as it is to wrap your head around this you need to stay the course and act "as if".
Trust me... they notice. Maybe NOT notice enough to come running back just yet but it gets there attention.
The thing about your spouse is that they are not going to come back because you say things will be different and they don't come back because you did something different once... they need time to see and believe that you are different and that the R could be different.
You will even get to a stage where your H may be very angry with you... that if you could be this person now then you were truly capable of being that person then and YOU choose not to... They have to work through this anger stage.
I get it that your H is having an A and it tears you in half but you have to know the more you pursue and chase the more he will cleave to his A. Walk away as painful as it is.... right now he has you both. He needs to see his life without you... he needs to see what he is missing out on.
Use this time to sort through your own feelings. Right now you being led around by your emotions - the pain of being left behind. Start working on you - maybe you really want your H back even after the A but then again... maybe you don't. Right now your emotions are dragging you all over the place (and that is completely normal!!) But, the more you detatch and stop pursing you might start to figure out what makes you tick and what drives you and what you really need and want from your spouse outside of just keeping the family together.