In fact, one of the meanings of "chasing you" in Cantonese literally means: You are in front, and I will chase you.

Another meaning is: you like a person and want to make friends with him or her (boyfriend and girlfriend). In cantonese, it is usually said: chase. It's what we usually pursue in Mandarin. Sometimes you can say "Gouni" in Cantonese (generally speaking, I like you in person), but when chatting with others, you can say: I met someone and I want to pick up girls (I want to pursue her). Cantonese people can say this: hook up with women.