It's the only explanation that makes sense. He probably saw our conversation and being an insecure beta male he forced her to ignore me because he was jealous. Granted she never mentioned him which is probably indicative of her being into me. Otherwise she would obviously have mentioned him. And if she didn't have one why would she suddenly ignore me even though I was merely writing her normally and basically just asked her how shes doing and how her trip back was.

I imagine him as pretty much a nerd, about 5'10", 130 lbs, the kind of person who breaks his back trying to get a box of alcohol free beer from his car to his apartment. He probably has 200 days on MyAnimeList, and if he doesn't watch anime he plays video games like LoL which is even worse. Furthermore he insists on calling her Japanese names, especially in bed, like imouto.

Overall he fits this starter pack really well ...

These are the sort of people who also easily turn violent towards their spouse as they feel their non existent masculinity being threatened.

I figure he saw our conversation when snooping her phone and threw a fit because he's an insecure pos.