Watched Age of Ultron – it really hurts my shipper heart.
Jealousy
Steve had tried to stay away from the bar the whole evening, preferring to sit with the veterans to exchange some stories about the Second World War. Of course he had seen the development between Natasha and Bruce, and he really had tried to feel happy for them. They were his friends, and all he wanted for them was to be happy.
But he couldn't simply ignore the horrible sting of jealousy that shot through him whenever he saw them together. Maybe pushing his feelings for Natasha away for the sake of the team had been a foolish thing to do. Obviously, no one else seemed to have a problem with a relationship between members of the Avengers, and now, it was too late.
He could tell that Natasha had a thing for Bruce; there was this spark in her eyes when she flirted with him, one that Steve had only seen before once.
When she had talked with him.
And Steve, he had just been too occupied with other things at first, and then, when he had finally realised what he felt for her, it had been too late.
It was too late now; and while he was trying not to watch while they smiled at each other, he felt like he was falling apart.