Oh, i happen to experience the same problem as yours. I will try my best to help.
If your osu crashes suddenly without an error showing in your screen, kindly check your event log.
To do this, press windows + R and then type "eventvwr", press enter and then on the left menu, locate the "Windows Logs" and inside that folder, find "Application(s)"
After you finished that, (you can filter for convenience) locate the "error" badged osu crash log. (you should be able to find easily if it happened recently.)
After this step, send here the log so that we can analyze.