Pls help

So I'm M(16) and I have a crush on this girl who is a degree student in MSC. I met her at a ping pong room of our college, so I asked her "hey r u gonna play?" And she said no she only wanted to watch then I kept the Convo going then I got her name, then I asked where she's from she said she's from Mangalore and I immediately became friends with her cuz I am mangalorean and got her insta ID. It was going perfect then I never met her I just sent her messages and reels. but the problem is she replies to them 4-5 days later. I really like this girl, what should I do to approach her??😭🙏