@jespah,
Why is no response a ditching? And if she's in love with him why would she ditch him?
Personally, some young girls do everything they can to confuse a guy, some smother their guys, others play hard to get, some push & pull, some tease, some play, some like to hang out...there's a wide, wide variety of girls out there.
Other reasons can be : she's confused herself; or her friends are giving her 'advice' that they heard from somewhere else; or her parents have certain rules she must abide by that she hasn't told you; or she's just plain uncertain; or she's upset at something you've done; or she wants something from you that you aren't giving her.
So you see the large range of possibilities.
The biggest thing - if things are too difficult (ie she's messing with your mind more than you like)...walk away and find someone who you are compatible with (one of the hints to this is that you are hugely confused all the time)