Ian Somerhalder and Nina Dobrev

Of all the Vampire Diaries twosomes, none is stronger — or more complicated — than Damon and Stefan. And although they've spent decades in opposition, the pair start to overcome their issues in the upcoming spring episodes.

"What's interesting about what's happening right now is the dynamic between the brothers. They are starting to really bond," Ian Somerhalder tells TVGuide.com. "A tease about the episode coming up is really about these brothers overcoming their disdain for each other and ultimately realizing that family is really embedded into the fabric of who we are and if you can connect with that it's really powerful."

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But we can't downplay the fact that they're in love with the same girl, which has been the constant source of tension since their initial turn to vampirism in 1864. They may have gotten over their Katherine issue, but her doppelganger Elena is still constantly coming between them.

"This whole Damon-Elena-Stefan thing is coming to a head," Somerhalder says. "Stefan knows that there are feelings flying around between the three of them and he's man enough to understand that this is a symptom of love and how complicated it can be."

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Paul Wesley adds, "Stefan and Damon will always love each other, but they'll always be in love the same girl. They'll die that way or they'll live that way for the rest of their lives."

If the triangle reaches a breaking point, can the brotherhood withstand whatever decision Elena ultimately makes? "Yes," Wesley states firmly. "The bond of blood is an amazing bond."

Watch this week's Vampire Diaries Bite for scoop on the Season 3 finale:

The Vampire Diaries returns on Thursday, April 19 at 8/7c on The CW.