Crush at work

Good morning, I have a little problem and I need some advice. I have a big crush on a colleague at the college where I work. I got in touch with her on Instagram recently, we talked quite well but she didn't restart the conversation and I don't dare push it too hard. Do you have any advice for me for the next few weeks? I would like to approach it but not always easy as I am naturally shy. Thank you so much !! 😊