Yeah glance but mainly signs are staring, joking, or sometimes j straight up coming up to u. But u don’t gotta go up and immediately flirt. Usually just a small complement from time to time is nice. Kinda j depends on the person. But also think abt the kinda person you would wanna flirt with and what they would do. I mean if it’s been longer than a a few weeks and neither of y’all have talked to eachother prob not it.