Date Positive is the UK's largest HIV and herpes dating site, with over 6,000 members. There are also members in the United States, but not many active ones. If you are registering from the US I would suggest creating a free profile and seeing if there’s anyone in your area, before upgrading to a paid membership. They offer some nice features with an upgraded profile however it would be nice if they explained exactly what you get with a paid subscription.
The mobile version of the site was a bit plain Jane and kind of confusing to know if you were on the right site. The desktop version is the complete opposite with too much writing. Yes it's all useful information, however we are here to find a match, not to read an essay.