I saw a tiktok on this so i’m wondering if anyone has a different answer?

so this guy asked 2 girls, “a a guy how do you tell when a girl is flirting or just being nice” then one girl said “if i’m like touching your arm or looking at you different” then another girl said how at a party she was talking to one guy for most of the party and the guy texted her afterwards thinking it was flirting. what are signs you do to show flirting or interest?
I saw a tiktok on this so i’m wondering if anyone has a different answer?
Post Opinion