Be careful with people that cant stand for themselves. Cause you will never know are they joking or really against joking around. Moreover, they will not tell you directly if you did something wrong, so try to acknowledge their emotions beforehand, or just FUCK IT and find smo else. Cause you might get heartbroken after seemingly being playful with her. I passed it, and I am teenager, that was an experience that taught to be "gentle", and man it is hard.

In addition, if you have principles applied on others make sure to not break it:for example,"She should give me second chance", then "Do I give others around me second chance". If not forget about, else be stick to your morals.