He really shouldn't feel this way.
You were his best friends daughter. I mean, c'mon, you were way too young for him. And being Clint's one and only, precious daughter didn't help his case either.
But you were just way too pretty.
At first, he felt like a creep. Sure, you were over 21 so there was literally nothing illegal. But still, it wasn't morally right to look at you that way.
But as he came to your dad's house, he realized that he was just coming to see Clint. There was someone she wanted, craved to see more than him.
You.
So when Clint asked him to take care of you while he visited Laura's family, he panicked. You were 22, did you really need to stay at his place and got taken care of like a toddler?
Apparently, after all the things that happened with the Ultron, yes. And him being the greatest best friend in the world, he accepted.
When he got up to get some water in the middle of the night to get some water, he wasn't expecting to see you standing in his kitchen in your cute little pajamas.
"Can't sleep?" He asked as he stood in the doorway, crossing his arms. You startled at the sound of him, since you haven't heard him coming here and looked at him
"Don't worry it's just me." He said with the usual smug voice of his.