How can I approach a guy?

We met on May at an event. He tried to talk to me a few times, but I sort of replied to him in a way that may looked like I was not interested (I was busy at the event). And eventually he stopped trying, and that was the last time we see each other. But now I reached him again on Instagram because I realised he was so nice to me that night, and I want to talk to him. He replied to my dm but didn't ask any questions about me. Can I just straight forwardly tell him that I am interested to talk to him and get to know him better?

How can I approach a guy?
Post Opinion