To clarify, I'm not talking about bipolar disorder. I know BPD means Borderline. 

I'm the one diagnosed as bipolar. I've been in a casual relationship/friendship (i guess one would say) with someone that is diagnosed with Borderline Personality Disorder.

Recently I came across a bipolar community, and they basically said they'd rather chew their arms off than be in a relationship with someone that had BPD because of how bad the symptoms mesh. 

My friend &amp; I have been on-and-off. We argue ALOT, and we go through periods where we block each other on social media &amp; literally just not talk to each other for months until one of us decides to reach out. But we're so alike it's scary. 

Basically I'm asking if relationships between a person with BPD and a person with Bipolar Disorder is really that bad? 

Nobody has ever mentioned it before. I'm aware that BPD and BD have many similarities, but I never gave thought to how they would react with each other. (Yes, I tried Google, but it doesn't understand my question lol). 

Has anyone had a similar experience, and if so, can you share your thoughts?