@MadHouseUpNorth What do you want to the outcome to be?
If I follow your posts correctly, you reduced contact with your sisters because you were jealous about their close relationship, then felt hurt because they seemingly didn't notice you pulling away and if anything, seemed to become even closer. (As evidenced by how they've named their children.)
If they didn't notice your upset then, they won't notice it now.
The way I see it, you can either continue to silently hurt at being left out, or you can gently confront your sisters about how you feel and try to rebuild a relationship. You may never be as close to them as they are to each other - it does sound like you've had different life experiences - but you could be closer than you are now.
Would that make you happy, or would building a relationship with them only compound the feelings of hurt if you could never get onto an even level?
You need to decide what would make you feel better, before you then consider what can be done to get you to that point. It may well be staying low contact is the best option for you.
Incidentally, the people I feel the strongest bond with aren't my blood siblings, they are dear friends I regard as the family I chose because we have shared interests and experiences. You may find more happiness in working on your friendships outside your family and replicating that bond between your two sisters between you and a non-blood related friend.
I wish you all the best in finding your happiness.