Of course you can know, like with this girl, read her words (the ones I quoted), pay attention to her actions, isn't it obvious?
She told OP she got back with her ex because of what he could provide. RED FLAG.
She told him she wants to get back with him, but doesn't know when. RED FLAG.
The final manipulation - "I'm not important to you anymore." RED FLAG
WTF, she dumped him!
This is the epitome of entitlement.
If a man can't tell or know what her (or any woman's) MO is from that, then not sure what else there is to say.