What are some chat sites that are good for deep conversations and a little flirting?

Hi! I wonder if there are platforms that combine light flirting with the ability to have a really deep conversation? It seems to me that in many apps everything is too superficial - a few words, emoji, and that's it. But I want to find something where you can not only joke and flirt, but also discuss philosophical questions, life values, or even dreams. I heard that some sites are specially created for such communication. Share if you know something similar!