Jealous/ Vindictive Scorpio friend?

I was cose to this scorpio chick a dnwe had a gr8 friendship. Well, not too long ago her and her bf broke up and immediatley after, he got my number fromher and tried to talk to me. I told her, very angirly that her bf did that, an I had no interest. Recently, a friend of hers that she knew before became clost to me bc we share common interest. I took note that she got jealous bc we had more in common. Now, I'm talking to this really hot guy, and my scorp friend became interested in him even tho shes not single. She'd make it look like his sister wanted her with him, shed always ask questions, and pry into my llove life with him. When I told her to stop she got mad and told people how I snapped at her, ect, and even told they i was jealous, basically making melook bad. Where is this b#@hy side coming from? It is from her ex liking me? She never compliments me either.. Is this a scorpio thing? Talking to her won't work, bc shes not going to be honest with me. She'll fake it.