Need advice from Cappies

I am a Pisces and kinda seeing this Capricorn. What I like about him is that he is blunt af, funny, loyal and most of all doesn't give up on me no matter how much I push him away. If I were in his place I would call me a bitch and move on😂

Cons is that: I can't communicate with him well. Maybe my fault because I am super introverted Pisces and beside that have BPD. I avoid talking to people😂

We are now in different place due to my studies but still he tried his best to stay connected with me. We have to talk on phone but I am even more awkward through phone. At least in person he can read my body language, see my smile etc.

What I am trying to say is that, he doesn't understand those personality of mine. He keeps on pushing my boundaries even when I tell him what I don't like. As I said he is blunt type so he sees it as an excuse.

I am not complaining because I am so grateful he doesn't give up on me. But I dunno how to communicate with him so please tell me what you all like to talk about.

You might say it depends on person but I think each zodiac actually have some things we like more than others. Eg for me I like to talk about random but meaningful topics, debates etc coz they lead to mental connection. I can do that with my scorpio and taureans friends. But other signs, they seem to be interested in different stuffs, I am pretty blind about Cappy so here I am.

And why I don't just talk about those stuffs? Well all we do is talk about random but meaningless stuffs. The line would go quiet until he says other random stuffs again and repeat. Which make it more awkward.

And please don't judge me coz Ik my faults too. I am trying my best to be a better person.