Most Helpful Guy
It's not the 18th century anymore.
Approach them yourself, if a guy has anxiety, doesn't have self confidence, thinks he is misinterpreting your signals, or doesn't know about your signals, or thinks you are a feminist that will shout - when/if he approaches you "OMG, GET ANY FROM ME YOU FREAK! I WAS SIGNALLING THAT OTHER DUDE!" then you'll have to approach him yourself.
If a player isn't acting upon your signals then you have to approach that player yourself0
Most Helpful Girl
Why not approach them instead? . o.0