I'm a few years removed from potty training, but for each of my 3 kids, they took at their own pace in their own time. My suggestion to you is to consider easing up and let it happen when it happens.
Child #1: We left him nearly naked at home from about 18 months on, and he used the toilet/potty/bushes outside pretty often, with some accidents, but we used diapers out of the house and at night until probably he was about 2 1/2. Kept nighttime diapers for a few years longer.
Child #2: She REFUSED to use the toilet until about a month after turning 3, despite me trying to start the process a few times. One random Thursday afternoon, she took off the diaper, sat on the toilet and peed, and that was the last diaper she wore during the day. I kept the diaper on her at night for a little longer until I was sure she would stay dry at night.
Child #3: Honestly, I forget. By then I was much more relaxed and figured it would happen in due time, which it did.
Good luck, and it will happen eventually.