Things become even more complicated if you are dating someone with Borderline Personality Disorder (BPD).

You should research both personality disorders because they have some similarities but they're not at all in the same spectrum.
One of the biggest similarity is the fact that both disorders show presence of an inner fantasy world and a tendency towards introversion.
I'm not sure what an extrovert can get out of this relationship honestly, unless they're extremely self-sufficient and need their SO to be a safe harbor rather than an active partner.
Don't try and encroach on his hobbies or interests unless he invites you in, it's his safe space, it's not personal, it's just how they make piece with the frightening and irritating mess of the outside world.
It is hard to remember a time when the marriage was tranquil.
Rather, each year brings more drama, intensity, frustration, distance, and hostility.
As an outgoing emotionally driven person, sometimes his emotional coldness and disinterest in reality (me) makes me very sad.(edit: for the reading comprehension impared Myself=Outgoing and emotionally driven; Partner of three years=Schizoid)Any advise as schizoids of how you like being treated in romantic relationship? There really are a lot of similarities between the two so they get confused/interchanged a lot.
Thank you, I often have to remind myself to sit back and remember he is schizoid (just like he probably has to often sit back and remind himself that I am ADHD) and that Love is about accepting someone as who they are, not asking them to be more than that. It's also a range disorder so I don't know where he is on a scale (you can google and compare if you want to give you a clearer picture), but I'll tell you the most important things which would make a relationship sustainable for me. Home should be a predictable, stable place of no surprises.
Though I must say that introversion in both disorders are not the same type of introversion.
The schizoid is introverted because he doesn't like people and would rather be lonely. The avoidant fears rejection and fears social interactions.
Each has their own flare of ego-centered behavior, inflexibility, distortion, and impulse control In multiple environments beginning in adolescence.