Help?

So at work like last week this kid seemed really cool and friendly and added me on Snapchat and I was like whatever I’ll probably never talk to him, but, he literally won’t stop snap chatting me. I’ll leave him on seen or just reply with like nothing and he calls me honey and flirts with me. I don’t know if I should unadd him or keep ignoring him? I don’t wanna see him again at work and have it be really weird but it’s really freaking me out