Meeting local cosplayers

I usually talk with local cosplayers about their cosplays to learn some
But I want to befriend, I don't know what to do. "Hey I like your cosplay" but I want to be your friend too. Notice me.

I usually browse instagram tags for the con I plan on going to. If I see anyone cosplaying from the same series I'll comment saying something along the lines of "Hey, love your cosplay! I'm cosplaying ____ to __-con too! If I see you I'll say hey and get a photo!" It's a nice way to meet people without much obligation to carry out a whole convo with them. And if you keep seeing them at cons, keep saying hi and getting to know them a little better each time, and maybe message them on social media if you guys hit it off. It's how I've made a lot of my con friends.