I think the first sign there’s a problem is when you don’t know someone very well and they are telling you their sob story. I started to become friends with someone like this a few years ago and then I had to get away from them. There is always a drama and she always wanted something from me but she didn’t reciprocate. I don’t have many friends but I am learning to keep a polite distance and avoid drama so the people in my life aren’t taking advantage of me.