This one is slightly angsty, and it's actually featured in both "Something To Talk About" and "The Dance".

Mac watched her from across the room. She was stunning a green dress that hugged her every curve, and her hair was swept up, leaving her neck delightfully bare. The person she was talking to said something, and she laughed loudly, the sound just barely reaching his ears. It sounded magical, and for a moment, and for a moment, the rest of the world dropped away.

He wondered how he had been a fool for so long. This beautiful, amazing woman had been right in front of him for years, offering herself to him, and he had just brushed by her, never looking up from his own pain and dedication to see it. She had stood by his side for so long that it felt as though she were a part of his body, and he just accepted that she would always be there.

He wasn't sure what had made him realize how much deeper his feelings for her went. But it was like the scales fell away from his eyes one morning, and he realized with ridiculous clarity that he was madly in love with her. The way she moved, the way she talked…everything she did took his breath away, and he knew that he couldn't waste one more day ignoring how he felt.

Smiling at her once more, he moved forward to ask her to dance. As he took that first step, though, Don came up to her side, his arm easily slipping around her waist. Mac stopped and frowned, watching them closely. The way she leaned into him, the way they stood so close together…they smiled at each other in the way that only lovers did.

In truth, he wondered how he had missed it. Both of them had seemed so happy lately, but he hadn't even thought that maybe that was because of any relationship between them. But as the thought back, he saw the stolen glances and hidden touches in his mind.

As he watched Don lead her out onto the dance floor and take her into his arms, Mac realized he had lost his chance a long time ago - and he had no one to blame but himself.