Anybody who just went through a breakup isn't ready for a new relationship (trust me, you do not want to be the rebound).
Give it some time. If you must communicate with her, be patient and hold off on the liking stuff. Just, are you okay? Or did you get homework answer #4? That is, be a friend, not potential boyfriend material.
BTW, even when she has fully gotten over her ex, she might still not be interested in you romantically. I suspect she isn't, but your mileage may vary.