Please tell me, if you can, what should I now do ... ??? Do I 'go dark' ... ?
First thing is to STOP ANY AND ALL PURSUIT.
Does that mean you can't talk to him? No, it doesn't.
Take a step back here and regroup. You seem a little weak emotionally right now, but you just have to understand the way the male ego works. I would recommend that you NOT contact him in any way shape or form and let him make the next move. You will have to be determined to wait him out this time. (Just wait him out THIS TIME)
It may take all you have to wait him out because he knows (as well as I do) that you are waiting for him to come running back to you. He has TWO women that are fighting for him. He secretly thinks he is all that. "TWO WOMEN after little old boring me"? I MUST be all that.
Regroup. Vow not to make the same mistake again. Backslide slowly destroy your chances. Many people will tell you not to beat yourself up over it. It may be wise to beat yourself up for a little here so that you know and realize WHY you can't keep doing it. People will keep telling you over and over not to worry about it and don't beat yourself up, while all along you are destroying the last glimmers of hope.
"Absence is to love that wind is to fire. It blows out the weak and kindles the strong.
I would leave him alone for awhile and let him make the next move by contacting you. Don't try to do everything at once here. Let's just get you to stop pursuing for NOW.