I've been in a long term relationship for years and I don't even know. I actually had zero interest in dating (still don't actually, yes I know I just said I'm in a relationship) and am aroace. We'd been close friends for awhile and realized we were basically in a relationship anyway and decided to try making it official. And several years later we are living together and pretty happy (well happy in our relationship, life in general is sadly not as happy due to external factors). I still don't understand flirting, or romance, but I like spending time with her and trying to make her smile. We are both almost certainly AuDHD, which I think helps us communicate with each other, even though we both struggle with communication in general. Like just say what you mean and mean what you say. I have had people get unreasonably angry with me for honestly answering a question they asked for an honest answer of. Like YOU ASKED!! It's not my fault I did what you asked. If you don't want to hear the truth don't ask me for it, because I'm gonna give it to you.