Expressing your feelings to a man through Instagram can be a bit tricky, but it's possible. Start by engaging with his posts and stories genuinely. Once you've established some interaction, you can send a direct message (DM) saying something like, "Hey [his name], I've enjoyed our conversations here, and I wanted to let you know that I appreciate your company. Would you be interested in grabbing a coffee sometime?" Be straightforward but respectful in your approach.