I do not own Tony, Gibbs, Abby, or anything else somehow related to NCIS.
Tony would sometimes watch the things Gibbs did.
He stayed very quiet about it, of course. No one could ever know that he counted Gibbs' cups of coffee and the Caf-Pows he grabbed for Abby. Far too many Caf-Pows.
Sometimes, impossible as it was, Tony thought he hated Abby. As even McGeek and Ziva know, Abby will always be Gibbs' favorite. All the "I love you"s and the black roses and their secret little conversations in ASL. Sometimes he hates them both.
Gibbs loves Abby and Abby loves him back.
He'd once come in to the lab only to hear Abby tell McGee that "something about his silver hair gets me all tingly inside." He thought he was going to be sick.
If you fall in love with Gibbs, remember what the second "b" is for. He lives up to it.