<human>: Summarize the given text in a few sentences.

The reason I have such a problem with it is because before they got together my girlfriend was in love with her for about 8 years, and then they were together for two years and they broke up because my girlfriend took the blame for something her ex did and went to jail for two years and now owes the state $30 000.

I can understand doing something stupid for someone you love and shes told me that she feels like an idiot for it and she has moved on from the love she had for her ex. But her ex texts her whenever she is upset or worried about something and my girlfriend talks to her about it. Her ex is now engaged to a man and ive said to my girlfriend "it is NOT up to you to make her feel better about anything in her life, she fucked you over and let you take the blame for something she did if she is upset tell her to talk to her fucking fiancé about it" 

She has said "you have nothing to worry about I just miss the friendship we had before all the shit went down so I dont mind talking to her every now and then" 

But I just dont understand why she would want to talk to someone who did that? And her ex lied about having cancer and said she was dying which is why my gf took the blame for the robbery.

Ive tried to turn it around and ive said "you hated it so much when my ex texted me that I completely stopped talking to her because I knew it made you uncomfortable but you dont seem to care about my feelings about your ex"

But she says my ex is different because we were engaged and after we broke up she would ring me for 1.5 years afterwards ranging from abusing me to crying about how much she loves me and made a mistake and how we could fix things etc.

I think its pretty much the exact same issue either way. So why does she just expect me to get over it and not care?
<bot>: current girlfriend of 7 months comforts her ex when her ex is upset, gets annoyed at me for texting my ex so I ended the friendship but she wont end it with her ex who she took the blame for a robbery for.