need some advice about this girl i like

No.

Pay better attention to what she is saying, and not in the context of wanting to date her.

1) She said she wanted space and time.
2) She said you're a nice person and she likes talking to you.
3) She said that you had a nice chat.

Annnnnddddd, that's it.

I hate hint-dropping; people rarely get it. Be more forthright and direct. Say something like, "Once exams are finished, I would like to take you out."

This accomplishes giving her the time she specifically requested and makes it clear that you are interested.

What is done with this information remains to be seen, but you are essentially putting a timetable on things. And she will say likely something like one of the following -
1) Sorry, I only like you as a friend.
2) I need more time than that (no one can ever, truly, know how much time they need. See answer #1).
3) Let's talk then and I'll see how I'm feeling (this is not the same as answer #1 as there is still a chance).
4) Don't call me; I'll call you (see answer #1).
5) Great!

You need more time FACE TO FACE together to evaluate this relationship. Texting and FB don't count when trying to create something with another person.

I think she sees you as a potential boyfriend, but it's exactly as she said in the beginning, she needs time alone after this break-up. Which is smart really, otherwise she could carry baggage into her next relationship.

But I think she sees you as a potential candidate for a bf. just keep charming her, and when she's had the time she needs to heal from her last relationship, she'll start dropping you more hints.