I need help, what do I do when my girlfriend becomes distant?

So I was watching a live stream of a smaller streamer who is friends with my girlfriend. We've been dating for two weeks and we always do stuff together. Nowadays she feels distant and long delays in replies (hours). So in the streamer's chat out of the blue she said "my boyfriend is mentally ill" and her bestfriend replied to it "LMFAO STOP". I always ask her about hanging out together or planning a date night but I think I'm being too obsessive or clingy and the fact the she said that I don't know if it was a joke, or something she actually feels... she has yet to reply to my message about 3 hrs ago. I wanna try and fix this before it gets worst. I need help and mentally as well lmao.
Note: This is an online relationship
I need help, what do I do when my girlfriend becomes distant?
Post Opinion