Always

'If unending and unbending love had brought Severus Snape to light, then Albus Dumbledore was sure, without the shadow of a doubt, that Gellert Grindelwald had never loved him.' Albus Dumbledore x Gellert Grindelwald. Because there has to be a reason to Dumbledore's reaction, and this is my interpretation of it. Rated for mature ideas. Hopefully you understand my nonsense.