What to do if someone owes you money..

I met this girl, me and her would call everyday and chat, then we were in the talking stage for almost 3 months, I would send her money for lunch since she works overnight at the hospital. until I found out she was “pregnant” by another guy and got mad when i asked her about it.

She acted like it wasn’t a big deal about me and her, but was real silent when I mentioned the money she promised she pay back.

Coming up to now, she “can’t” because she “hasn’t worked” and this and that. She even declined the request on cash app, so yeah that’s her saying that she ain’t paying shit.

I know I can’t force her to pay me back, but the signs are telling me that she’s not gonna pay back the money that SHE asked me for and promised to pay back. I don’t know what to do anymore…