BuddyPress.org

Why can’t you access admin is more to the point, what exactly is happening. You do not need to remove BP plugin simply rename it which has the effect of breaking or un-setting the activation.

If you have tried solutions it is insufficient to state you have that is meaningless, please make the effort to describe accurately what the issue is, what steps you have taken to try and resolve the issue.

Lastly issues like the one you allude to tend to crop up on a daily basis please be sure to have searched quite thoroughly for a solution in past threads as generally you will find the resolution already described.