Fanfiction.net could also be a place to look. However, keep in mind that this is a rather unusual concept so it might not be easy to find. You may need to use the search function carefully, typing in relevant keywords like 'chucky', 'andy' and 'love' to see if any relevant stories pop up.
Some niche horror - themed fanfiction communities or forums might be a good bet too. These places often attract fans who like to explore different and often dark interpretations of characters. They may have some fanfictions about chucky and andy in a love - related context. But be prepared for some rather unconventional and perhaps disturbing content.