Half a year ago I met a girl in my university project, all online since she is 2000km away due to covid. Since the holiday (it's been about a month), the project is over and we haven't talked since. She told me that she has anxiety and depression, which makes her retract from social interactions, including texting. I want to comfort her and just have a nice time talking with her, but sending a text won't do, since she doesn't see them. I tried to call, but she doesn't answer. There are some other social media platforms which I know she uses, but I don't want to spam her all over the place and be too intrusive. We had a lot of fun when we used to talk, so I'm pretty sure she isn't ignoring me on purpose. I really don't know what to do anymore. Any advice or similar stories would be highly appreciated.