<human>: I don't know if this is the right subreddit, if not please forgive me !

Ok so this is my story.
I was in a 4 year relationship since 2nd year of highschool and it has ended recently (a couple of months, not keeping track of it).
Since that day I improved greatly, got a job (Android developer, it's relevant). and started doing some other interesting stuff but nvm that.

Now I'm studying ComputerScience at a nice university and it is obligatory for everyone to take foreign language classes to get a degree (so I choose english because it's easy for me). And in this class I spotted a really nice girl.

But because of that long term relationship I completly didn't know how to approach her. And suddenly about a month ago a miracle hapened. At the end of the class I saw her packing an Android developer guide to her bag. So after exiting the building I approached her and we started talking casually. The next day I got her number and two days after that I asked if she wants to meet aside of the english class.
She replied that "Of course !" but she has a lot of work on the university (due to the fact that the semester is ending soon) and it's hard at this moment.

So I thought it's legit but as time passed I started thinking that she just politely wanted to say "no way". So for me the next english class was a test if she is into me or not. 

And to my surprise when I entered the class (as the last person) I noticed that she sat on the chair next to me instead of her usual seat. So we talked a bit, she laughed at even my fail attempts to be funny (so I assumed she is into me). But I asked her if I will se her tomorrow and she replied that probably not because of an exam and lack of time.

So now I am really confused. Should I approach her again and ask her out in some more confident way or is this a lost cause ?

Can you succinctly summarize the text in 1-3 sentences?
<bot>: A girl is giving me mixed signals, she seems to like me but says she doesen't have time to meet due to exams and stuff.