Thor had only just come back from Earth from retrieving Loki from destroying the Nine Realms starting with Earth. He wondered now why his brother had fixated on that planet when there were many more. He wondered now if it was because he had found someone on Earth.
The thought of Doctor Jane Foster made him ache. He knew he had to leave without seeing her or he would never want to leave Earth again. He knew he had to deal with his priorities, and the one that was on top was taking Loki back to Asgard. To put him in solitary confinement.
Thor ached for her; he always would. He understood he was a demi-god and she was a human. There was no way for them to be together, and he knew that as much as it hurt him.
Thor checked with Heimdell everyday, and everyday he would give Thor the same answer. She was fine. He would tell Thor that she and Dr. Erik Selvig was still doing good work for S.H.I.E.L.D. It might not always be safe work, but it was good work. They understood that, and they understood the risk.
Thor knew that one day he would see Jane again, but the question was when.