Well I have had a similar situation to this one and it went something like this:
Me and the girl had a great time, I kicked ass gaming her etc.
Now suddenly one morning (we were in a same camp) she starts ignoring me... I tried to speak with her few times but she said shes really busy and things like that. Now I think to myself that okay, I will not chase her... And ignored her.
The last day in the camp, I just hugged her and said "Mind if I ask you a question?", which she ofc just said "No, don't ask."
Well now I was about 110% sure that I had lost her... So now I just moved on to my next target (her friend *cough*).
Now suddenly, 2 months after the camp my original target texts me and after a while admits that she have been thinking about me all the time (24/7) since our camp etc... Also she said that she was texting without her friend knowing (her friend likes me... Hmm.)
The situation today is that my original target AND her friend likes me... Badboy, am I

?!
The answer to your question is: Create jealousy.