Break-up comfort????

My friend (ex-girlfriend from way back) just got broken up with by her current gf (I guess most recent ex now oh) TWO DAYS before Valentine’s Day,,,, how do I comfort her?? Baring in mind that the three of us are like,,, mutual friends so I can’t really take sides too much?? But also I’m closer to the dumpee than the dumper?? Sorry this is such a mess I’m not great with emotions

UPDATE:

After being a complete icy asshole all day, her girlfriend bought her a bunch of shit and essentially bribed her into forgiving her so,,, I am unbelievably done with both of their stupidity. This is the FOURTH time this has happened in the last year and I just give up trying to stop them making the same idiotic decision over and over again