Stephanie Owen lives in Y Felinheli in Gwynedd. Last April, she met Christopher Boulton, who she’d worked with 10 years ago.
Around Christmas time last year, she began to notice a change in his behaviour.
He began to try and control her, and wanted her to spend less time with her family and more time with him alone.
In the Easter holidays when she took her children on holiday, her ex-partner wasn't going to let her forget about him.
Despite her friends telling her to go the police, Stephanie held back. But weeks later he turned up at her house in a fit of rage one Saturday night.
In May, Boulton was jailed for two years for burglary and harassment.
Almost half of stalkers are ex-partners and now with more people being prosecuted for stalking and harassments than ever before, Stephanie hopes that by speaking out she will help other victims like her.
You can see the full interview on Wales This Week tonight at 8.00pm
If you've been affected by stalking you can contact: