How do I decide what to cook?

I can't decide what to make for dinner I am so indecisive and it is paining me going backwards and forwards. I have some chicken breast so could make a stir fry but on the other hand I kinda fancy something cheesy so thinking a Mac and cheese and save the chicken for another night? I'm really torn and by the time I decide if will probably be too late to eat! Unless I can combine the chicken with the Mac and cheese but not sure