EBH. She's obviously being overly needy, and she was rude in a couple of different ways - it's rude not to RSVP and to then showed up unannounced, and it's also rude to call you expecting help the night before your wedding. But it doesn't seem like she did anything else wrong, and those don't seem to me (at least assuming this is a friend you really cared about) like behaviors that deserve a response of ending the friendship and blocking her on everything.

You mention that she wanted to hang out more than you did, which you interpret as needy, but it doesn't sound like she threw a fit or engaged in hysterics when you turned down her invitations in favor of spending time with your partner, so what's the big deal there? She...invited you to hang out too often, and then accepted it when you said no? Heaven forbid! If that bothered you so much, you could have communicated like an adult that you were getting frustrated by her numerous invitations and needed her to tone it down.

I think she only did 2 semi rude things that most close friendships would recover from, so your response speaks volumes. It seems like you never really cared about her that much, so at least own it. If I were one of your other friends, I'd find it off-putting that your attitude seems to be along the lines of "she engaged in horrendous behavior and I was only reasonable to completely destroy a close friendship over it, right guys?" It seems that either you severely overreacted, or you never cared that much about having her in your life in the first place, both of which make you the BF along with your ex-friend.