When family seems to dissolve

So the shit seemed to hit the fan today. The other day my gf, L, sent her ex and long time family friend of mine, C, a msg on Facebook standing up for me because of what C had to say when she found out that L and I are seeing each other.

After 12 years of friendship, C told me that I had betrayed her and that because I ws justifying being with L that I was a bad person. And that she wanted me out of her life completely.

That sucked to hear and it wasnt exactly was I was expecting but it was worse.. far worse than I expected the reaction to be. Fine, so be it. C made the choice to kick me out of her life when I wanted to try to keep both C and L in my life. They are both amazing people and having them in my life has enriched it exponentially. But, if that's what C wants then so be it. L was standing up for me and letting C know that she thought C was making a mistake by kicking me out of her life. She didn't expect a response back, she just wanted to get her peace and that's all.

So my middle sister who is best friends with C found out last week that L and I are dating and she blew a gasket. Fine, understandable. But this is one of those pivital moments in my life where I need my sister to be exactly that: my sister.

So my sister and I haven't really talked since Friday when I told her who I was seeing. Today, my gf sends me a text msg telling me that my sister was harassing her via text and was instigating. L forwarded me the text msgs and it was then that I lost it. Completely. I called her and when she picked up she didn't let me get a word in edgewise. Her basic dialogue with me was something more or less like this:

"Hi Jennyyy. Are you calling me because of L? Are you telling me to stop talking to L? Because I'm not going to fucking listen. Byeeeee." (Need I mention that this was all with attitude and sarcasm as the underlying tones)

She then hung up on me.

That's when I couldn't take it anymore. I lost it and broke down. Cried. And proceeded to call my mom and tell her what happened. *(Side note: my mom is being more amazing through this then I thought she was going to be and she really is my best friend)* I told her that my sister was harassing L and how she handled my phone call to her and her hanging up on me and that I needed her to just be my sister. To be happy for me. To choose blood over her friends for once in her life. She said she'd talk to my sister and she did. Nothing really positive came out of it other than my sister telling my mom that she loves me and that she is being my sister but that she's sticking up for her friend.

My mom called me back and told me that L just needs to erase all contact with C as do I. Fine. We both know what we have to do. We both knew that this would probably happen. So we expected something along these lines. But for my sister to be so utterly mean to someone is beyond my understanding. Especially if that someone means something to me. I'm upset adn angry with my sister and frustrated because this is partially my fault that this is happening on L's side. Given we both are facing extreme... dificulties when it comes the repercussions of starting a relationship between L and myself.

This just all sucks so hard core I dont know what to say, how to feel, how to react..nothing. I got nothing.