It's your decision whether to tell your partner you have HPV (i.e. you have had an abnormal Pap test) or not. If you have genital warts, you may choose to discuss this with your partner as he/she is at risk of developing them as well, and they can be treated.
It's possible to have HPV for a long time without ever knowing it, sometimes as a result of sexual activity many years ago. Finding out you have HPV doesn't necessarily mean you or your partner has been unfaithful.
If you do decide to tell your partner you have HPV, it might help to include these points:
For more advice about how HPV affects you and your partner, you can call the Cancer Council Helpline on 13 11 20, or talk to your doctor, nurse or sexual health clinic.
Lucy's story
I've always been very aware of the importance of regular Pap tests, as my Mum had early-stage cervical cancer in her 30s.
She encouraged me to start having regular Pap tests when I turned 18 and I followed her advice, albeit begrudgingly!