I feel ignored by my friends..?

My best friend Lilianna and my frenemy Molly have been leaving me out & ignoring me lately and I'm soo sick of it. Whenever I'm around they just act like I'm not there. Lilianna and I used to be best friends. Lilianna & I hate Molly, and Lilianna pitied her, so we started to hang out with Molly more. Then we got in a fight & I refused to talk to Molly a couple months ago, but Lilianna still talked to her after that. It wasn't so bad, but lately they've been talking more and more and Lilianna and I don't see each other much. Sometimes Molly and I talk, but only because SHE pities ME now. I'm so confused! Whenever Molly and I are hanging out and Lilianna shows up, Lilianna just freaks out and makes up a stupid excuse of why she has to go. I didn't do anything and I don't know what to do? I always listen to Lilianna's problems but whenever I try to confide her in mine, she just brushes it off like it's nothing, even when it's worse than all of hers combined. Molly is always complaining and getting mad about stupid stuff, and her life is PERFECT. She's such a spoiled brat. Now whenever they're hanging out or playing games, they don't invite me, and if I ask to join, they hit me with a thousand questions and make it difficult for me to respond, or they just make a stupid excuse, like oh you wouldn't like it, or you don't like this game, even when I've never played it in my life? Please tell me what to do?? I have lots of personality disorders and it's hard for me to make friends, so pleasseee don't say just make new friends, because it's nearly impossible. I'm way too shy around people and I don't know how to act. Please help. :( This is literally ruining my life and making it 100 times worse than it already is.