Can I file a lawsuit against an ex-friend to which I loaned money too?

On December 23, 2014, my ex-friend texted me and said she was crying, telling me she was embaressed she couldn't afford to buy her daughter a Christmas gift and asked me if I could lend her money to go shopping. I had only 80.00 on me at the time so I lent it to her. But only after she promised and swore she could pay me back on January 5th when she got her daughters benefit check from her fathers death. I gave her until the 8th to pay me back. She did not contact me, I had do keep texting her asking for the money she owed me and she threatened to call the police n file harassment charges. So my question is can I file civil charges To force her to pay me back if I have texts saying she will pay me?