I have been living together with 4 girls, one of them I married and I have got 2 daughters with her.
My way of getting through separations is by keeping myself busy, and I always do a clean cut, with them, ie drop all contacts with them.
I have to keep contact with exMrs because daughters live halftime with me, and half with her, that's the one and only reason ( in Sweden we share 50% of belongings in a divorce, but neither do pay something the other party after that).
My experience through friends is that you tend to get used if you accept friendship after being dumped, and if you dumped her, she still believe she got a chance to get you back.