My (24M) girlfriend (25F) told me she can not feel feelings anymore. And that she does not really feel anything towards me. What should I do?

Hey.
So basically, I have been only dating this girl for about 2 months now. I know, online relationship... I have pretty serious mental health condition and I find it easier to start communicating with people through internet and meet after that, but that is not the point of my post, just wanted to clarify.
So, everything was going perfect. I felt really happy and loved after a very long time of just feeling nothing, feeling empty, and yeah. We were calling pretty much every day, texting all day and night, watching movies, listening to music, just doing stuff together through the internet. We are, or were supposed to meet in January.
About 2 weeks ago, she started acting weird. She told me she is not in the mood to talk with me, and that is where the issue has started. She wanted space and I gave it to her. After a couple of days, she told me she is feeling numb, that she can not feel any emotions anymore, and not even towards me. But she wants to stay in a relationship with me, in case her emotions come back. But this is an issue for me, because I just don't take this very well. She started replying in a way as if we do not even know each other, she stopped saying I love you, not replying to my "I love you's", she stopped calling with me, she responds in a very vague way. And all of this is just hurting me and not doing me well. I am starting school from next week, and I am really stressed about that, after 2 years of being at home and hospitals due to the mental health issues and this is not adding anything good to my plate. I really love her, but this is not what a relationship should be like. I tried to give her time, tried to give her space, but I do not see any signs of improvement. She told me she has fun with her friends and everything, but she does not even want to call and talk about our days anymore. I am not really sure what else to mention as I am writing this for the second time. I will try to answer all of the questions in the comments about the relationship. I am just really lost, sad and broken and I do not know what to do.
What would you do in a situation like this? Break up with her for my own mental health? Stay in the relationship and suffer through it, with the hopes her emotions will come back?
Please, I really need an advice, I don't know what to do myself.
Thank you for any kind of help.