sphil, I think that she had actually realised she would like to give it a go with him but he was angry at her and when she got there, that Katy was there and blamed everything on Neela. (When Ray got him by the truck, he was trying to phone Neela and looking at his phone)
I think Ray was insinuating that he didn't want anything out of pity and she left. You only hear a few more things about him through snatches of conversation and noncharacter Katy sending a care package. He goes home to live with his parents.
I also dislike the way that everyone is in love with her.
Luca does come back this season at some point. But...maybe a little too late for Abby