When will it be me?!!

So I'm just into the TWW (feels a great deal longer) of 6 months trying and my partner came home from work and told me his brother's GF has just found out she's pregnant (They wasn't trying)...i want to be happy for them but I just don't have the energy to fake it. I'm trying not to be bitter or break down and cry but I'm not sure I have control anymore. Any tips or advice on how to deal with it?