So I noticed this random girl tagged my boyfriend in some post so I joking tweeted something rude about it (not about her, but like a screenshot of it and then question marks). He started getting really defensive about her and told me she has depression. I asked him how he knew that considering he just told me they've never spoke. He said she told him so I was like um?? And not we're in a fight and hes calling me rude and yeah I'm not sure what to think of it. Apparently she was in one of his classes last semester And that's how they met. I'm trying to talk to him about it but he isn't saying much. (Additional info: we've been together almost 2 years I'm 17, he's 16)