I have to agree with everything everyone has said here. The brothers share an unconditional love and a bond that no one can break no matter what. They've tried countless times to hurt each other but it's never really happened. Without really realizing it, they've also shared many things, including love. They [somewhat] shared Katherine and to an extent, share Elena. Yet, they love each other. And that is huge. I completely love how they are able to go extreme lengths to save each other and what really makes me smile is when they won't admit they care for each other, especially Damon but they make it quite obvious with their actions.
Season 3 will definitely be more of a Salbro's season and it'll show the love the two share for each other more. It's exciting. =]
-Jot.