I'm in an open relationship but she doesn't know
Why haven't you told her about that?
Being in an open relationship is difficult.
She may not be okay with you having an open relationship. I would recommend you tell her right away and if it's okay with her then definitely you can continue having an open relationship but if not I would recommend that you END all of the other relationships that you have and focus on your current partner.
No, I like the drama so I will continue to do it.
Your partner may not be into it and you are actively hurting her feelings. You wouldn't want to hurt the person that you love, right?