Eddie didn't have an ounce of panic on his face when Buck said he was leaving. He just let Buck go through his dramatics and then politely told him he was stuck with them before moving on. Eddie knows him better than anyone.
This last scene was GAY! No one can convince me otherwise. Just look at Ravi checking Buck out. Now if Ravi ends up being Buck's temporary gay awakening that leads to Buddie and then Ravi ends up happy with someone else, I'm all for it!