Help please from any Sun Cancer with a Scorpio Moon Female.

I'm in a long distance relationship with a cancer women that is moody at times and hard to understand what she thinking most of the time , when I visit she very protective, loving and caring I love that in a women .. when I'm back to my state , most of the time I text her things I don't mean or misunderstood she get offensively with rude responds , when I ask her why don't we jus talk on the phone like a normal couple? She say she not a phone person .. I tell her everytime she misread what I'm trying to say she get offensively and I don't like it , talking on the phone is a lot better so u can actually understand what I'm saying instead of reading , she tell me it's okay you jus have to get used to it , wth.. I love it when I'm with her and hated it when we apart and texting idk what to do... now she wanting to move to my states to live with me with her son , yes she have a son , don't bother me one bit I love that kid he's a good child , I want to understand her more , is this normal? I heard a moon sign is really her personality. I read up and it really don't tell me much , any advice is appreciated and the negative one like dump her or whatever I see in most posts I don't need that thank you.