Replying to Soo my supa hot ex gf just calls me ...

soo i just get a  call from my EX gf.. We broke up 2 weeks ago and shes back staying at my house as we hooked up while i was in canada earlier in the year.. and she flew here and we lived together for like 3 weeks ada yada broke up ,, anyways... I had to go to work at the casino otnight ..
and shes gone out partying.. I was meant to pick her up.. its midnight now and she just called me and too tell me shes picked  this super hot chick and is going home with her now...( shes Bi) do I get jelous??
is it the same as a dude?  or should i get of on this  or should i be really jelous ..l now im fucking kicking my self i shoulda tolsd her to come back with her to g up the 3 way ,.. now do i drive down the road or wait 10 mins for her to call me back?? quesitons questions...