There are people that you will talk to on a dating website who are not guaranteed to be there when you return the next day.
People just lose contact with others quite frequently on dating websites.
If you have noticed that this person’s profile just disappeared, it may be because they reached a point where they no longer wanted to remain on the dating website.
You shouldn’t have any trouble finding an option to unsubscribe from the dating site by entering the “account” section of your dating profile.
If you have looked for the option to unsubscribe in the “account” section and it is either not there or isn’t working, you can call the customer service number of the dating site that you have been using.
Every reputable dating site has a customer service.