slide into his DMs

I hope I can get some help but I am crushing on this boy so hard and I barely even know him. I am friends with him on Facebook and wanted to follow him on snapchat because that's were I post more often. I found him on snapchat but I would love to talk to him because my god he is fine as fuck. Is there any advice I can get? I am confident but not that confident to slide into his DMs with just something, I see him watching my snaps but that's it and I also do watch his as well. Please help me y'all!!