In these there is definitely definitely Tony whump, and Loki ends up being his solace, but tony doesn't actively seek out Loki if you were specifically looking for that. It just kind of happens.
This ones on a temp hiatus I think, last updated in November. 50k: http://archiveofourown.org/works/2140572/chapters/4688460
This one's not quite as closely RTYI as the one above: http://archiveofourown.org/works/1679843/chapters/3569030
This one has Tony!whump and Loki makes it better, but not much more related than that: http://archiveofourown.org/works/1289335/chapters/2673436
If these weren't good enough, let me know, if I think hard enough I could probably remember one or two more, but I'm really not that big of a tony/Loki fan
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This ones on a temp hiatus I think, last updated in November. 50k:
http://archiveofourown.org/works/2140572/chapters/4688460
This one's not quite as closely RTYI as the one above:
http://archiveofourown.org/works/1679843/chapters/3569030
This one has Tony!whump and Loki makes it better, but not much more related than that:
http://archiveofourown.org/works/1289335/chapters/2673436
If these weren't good enough, let me know, if I think hard enough I could probably remember one or two more, but I'm really not that big of a tony/Loki fan