Girl trouble. What should I do??? I dont know why this happened.?

I got with this girl 3 days ago and have been since. Last night everything was fine we had a good time but my friend was there and he likes her also and once we were together that night he was in a bad mood and pissy. my friend went and talked to him and he told him that was why he was pissy so he told the girl for me that we had to take it easy around him so that he didnt get even worst and she said ok. So we dropped him off and then we were together and i hooked up with her and kissed her good night everything was fine she had a smile on her face. Today I wake up my friend tells me that his gf (her best friend) told him she only wanted to be friends. So then I texted her she wouldnt answer me, i texted her friend she wouldnt. Then she texted me back saying she wanted to be friends bc she didnt want it to be awkward. Then I asked her if it was bc of my friend she said no not at all. I asked her what it was and she said she meant she didnt want being friends to be awkward. She asked me if I was cool with being friends and I said nt rele but w.e . Then she didnt answer me. IDK WTF HAPPENED what shuld i do about it