Talk to both of them about it. Communication is the most important thing. [ that could be.. awkward, he knows, especially for the poor girlfriend, but it's something they'd have to do. ] After all, he's had years to change and move on, but in her last memories, it was just the two of them.

[ he sips his drink again thoughtfully, eyes on loki's profile. ]

Make sure they both know how important he is to you, and that you want to decide--together--what's best for all three of you. [ he nudges his toes against loki's shin. ] .. You're going to have to be honest and vulnerable if that happens.