Don't listen to this guy.
To the OP: She did not friend-zone you. The fact is she is a SINGLE woman and you are a SINGLE man. You are not dating. That means she can talk to whoever she wants and so do you. If you had been spinning different plates then this would not bother you. The only way to pass this test is to not care, TRULY not care. The kind of apathy that comes from knowing you already have some bench warmers waiting for you. As soon as one girl acts up, you switch another one into play. However, this girl did nothing wrong. You said you've only been talking to her for a couple weeks, you can't expect her to just drop every guy she is talking to immediately for you.
It's obvious she already has some attraction invested into you. (Flirting, friendly touching etc..) so you are doing good. Now she is going to test your emotional reactions, and it's up to you whether you pass or fail. Don't even worry about the other males, pretend they don't exist, all YOU need to focus on is increasing her interest towards you. This will come from not getting jealous over other guys. Treat her the exact same way as you have. Get her feeling amazing around you, increase the kino and playful touching, REMIND HER why she loves being around you. If you stick to this confident frame then slowly she is going to weed out the other competitor males. You are going to be all she thinks about.
But more importantly, ALWAYS keep spinning plates. It will keep your head on straight. Instead of having to fake all this confidence and apathy why not really enjoy the fruits of it? This can only be obtained from knowing the fact you have plenty of options. Don't ever tell the girl, let her know through your body language, make her wonder.
-Scars