<human>: Give me a shortened version of the text

Before my girlfriend (let's call her "Beth")  and I started dating things were cool between me and her friend (We'll call her Alana). Alana and I had known each other as we had both been in choir together, and we'd occasionally say hi and talk and she had apparently told Beth that she knew me before she did. As weeks went by Alana became more and more bitter. Eventually saying that she hopes mine and Beth's relationship "isn't anything long term" (behind my back of course) and eventually telling beth that I'm "no good for her" yet I never said anything negative to Alana and never stopped Beth from hanging out with her, in fact I encouraged it. Beth dropped Alana after she accused her of lying to her to avoid being with her and in turn being with me. When in reality she was working a volunteer job in the schools performing arts building and I had met her in the cafe to bring her Tacos and a lemonade. It's been 2 months now, and Alana is still trying to talk bad about Beth to our friends. However when I see her she's all nice and extroverted with me. Is this something I should be concerned about? Was it best for her to drop her as a friend, I feel like it's all my fault and I feel like I disrupted a friendship, not to mention that I feel like I've done something wrong to warrant such rude comments from someone who I've never had a problem with and never seemed to have a problem with me.
<bot>: my girlfriends dropped her former best friend after she was making snide remarks about our relationship and me as a person even though her best friend and I were friends in the past. And I feel like it's my fault.