Cant locate Hrothgar after leaving him Options

[Tassadar]

I've recently begun to play this amazing mod - completed few parts so far
I've left Hrothgar in my planar sphere (told him that i will find him when needed) he said something like "im not sure we will meet again, but i wish you goodluck". After few in-game days he disappeared and i cant find him anywhere : /

Have i ruined my save, or is it still possible to meet him again?

Thanks for any tips!