If u like a 流行的 girl and want to ask her out wat do u do I've had a little bad history in the past

If 你 like this girl that much, I think that 你 should be honest and ask her out. She should at least appreciate your honesty with either outcome; I know that I would if someone had told me how they felt.

And what exactly happened between 你 and her friend? Was it something really bad? If it was just some trivial squabble that wasn't really that important, then I think that 你 should be alright. But still, either way, whether it ended up to be a problem 或者 not, 你 both should meet eye to eye and apologize. It's best to let bygones be bygones, as they say, since grudges aren't very good things to hold against someone. It's only a burden on your shoulders, trust me.

I wish 你 good luck.