Are you really, though?
Truth be told I've been ignoring your threads for a minute due to the frustration of not seeing you heed advice or make any sort of progress, 'cause as weird as it may sound, my dude, I wanna see you do well and learn how to navigate the treacherous waters that is acquiring companionship even if it's just for the sake of coitus.
With that being said, You should already gauge when a chick is interested in you, or at the very least, being receptive to letting you make her interested in you if she isn't already. You ain't got to be a dikk and hit her with no crass shyt that will have her respond in anger just to prove that she was ignoring you before, but you got to atleast try and level with her on some common ground since women almost always go into defense mode when approached/chatted up by dudes they don't know like that 'cause they think we only want one thing (We do, but they want it too, never forget that).
If you simply saying "Hi" and she ain't responding, chances are you failed to garner any interest in her from prior conversations, or she just wasn't feeling you like that and ain't trying to (That's ok, it happens...alot at times) and with that, you should just keep it pushing, but you gotta find a common interest, even if it's one you don't know about and have her explain it to you and what she likes about it just to get the conversation going....WITHOUT slapping your dikk all over the dialogue. Once y'all can talk and be cordial, you can casually deduce her status, her receptiveness to you within that status and try and get closer.
But if she ignoring you....keep it pushing. Don't be that dude she leaves on "Seen" and clown when she with her friends/other dudes. Way too many broads out here to be stuck on ONE that ain't fukkin' with you.