The 19-year-old said that it wasn't fair that she was called a "slag" by Maria Fowler for going on a date with Lauren Pope's ex-boyfriend Kirk Norcross.
She told Reveal: "I'm being victimised. I didn't deserve Maria calling me a slag.
"Kirk and I were both single so I didn't think there was anything wrong with going for a drink."
Mecklenburgh explained that she would never "steal" somebody else's boyfriend: "I've never stolen another girl's boyfriend and never will.
"I have been cheated on and it wasn't nice. Everyone I've been with has been single."
Mecklenburgh also insisted that she slept with Mark Wright a fortnight before he proposed to Lauren Goodger, although the 24-year-old has denied it.
She added: "Lauren and I just keep away from each other.
"She's brave taking on someone like Mark - there's no way I'd ever put up with him."
Another star of the reality TV show recently claimed that the programme is staged.