do you think that elana will ever be friends with damon again?

No, As much as I hope she does I actually do not think she will ever forgive Damon for killing her brother, now im not saying it won't happen because there is every possibility that she might forgive him and her brother did come back to life, but that doesn't change the fact that Damon still killed him and the fact that he didn't know Jeremy was wearing the ring really doesn't help his case, and even though he was on a bender Elena really does love her brother and in killing him without even a thought about it I think that showed Elena how far Damon can go and it really made her feel some hatred for him, so my answer would truthfully have to be no. :/