Should I ask out this girl a second time, or should i just leaver her alone?

Don't push your luck. She is just being a friend, if that. She ended whatever there was between you two, if she wants more than a friend, wait until she makes that crystal clear. Kids are mean sometimes when someone is dating someone that they themselves like. Is this jack*** interested in her? Why don't you spread that story. and let him taste his own medicine.