<human>: I broke up with my girlfriend about three weeks ago when I found out that for the past two years she had been telling lies about me to my friends.

She has manic depression (and I suspect bipolar disorder), and has always tried to keep me from my friends and family, and apparently also the other way around.

For the past two years I have been raising her son (from another marriage) with her, although it was mostly me doing the raising. We had grown extremely close when I felt like I couldn't take her lies and abuse anymore. When I broke up with her, she told me that she didn't want me to see her son anymore. The last time I saw him I kissed him goodbye to go to school. 

I miss him, and I'm afraid he is going to blame himself for me not being there anymore. I just want to reassure him that I love him, and that the break up has nothing to do with him. I tried to contact his father and he thinks I should talk with his son too, but he doesn't want to get involved.

I just don't know what to do anymore.

Could you distill the essence of the text into 1-3 sentences?
<bot>: Abusive ex-girlfriend refuses to let me say goodbye to her son after raising him for two years. I dont know what to do.