[It's all about expectations. He thought he'd finally be happy when the war was won and he could go home.... Obviously things went entirely differently. He knows it's better to try and be happy in there here and instead of relying on some possibly unattainable point in the future when things 'go smoothly', but Drift is also an idealist and dreaming for a better future is an easy habit to fall into.]

It's just a part of life, there's no reason we can't find great moments even amidst it all. I mean... [He lays a hand meaningfully on Megatron's chestplate.] Isn't this pretty great?

[Drift grins.]

And that's pretty great too. I think he's figuring out what he wants. Or rather, coming to terms with desiring you, and if that desire is something more than physical. Which... [he chuckles.] I kind of knew all along. He's told me himself that he's bad of casual interfacing, that he always grows attached to this partners if they become regular. I think the physical vehicle is how he decides how he feels, if its worth pursuing, and not having access to that vehicle with you has made him flustered and uncertain with how to define the feelings.