<human>: Could you distill the essence of the text into 1-3 sentences?

My ex and I started our relationship while we were best friends with the agreement should we break up we would remain best friends.

Now she is going through serious life changes and troubles, and When we try to talk she always ends up throwing the things that made her break up with me in my face, or shutting me down in the conversation completely. (I believe this is from stress)

I'm just trying to be the best friend I am, but keep making the wrong moves, and saying the wrong things(regarding this high stress situation) I don't know if I need a lesson in being a friend, or if she honestly resents me. 

I don't want to just totally cut her off to give her space (she still considers me her best friend) But I also don't want to add to her stress more so than when we were in the relationship.
<bot>: My ex is going through a lot of home issues. I just want to have a conversation with her, but it always goes south. I don't know if this is due to stress and if I should back off completely.