My Relationship is falling apart

My boyfriend accused me of something I didn’t do last Sunday and we went on a break and was supposed to meet on Monday to talk, however he didn’t speak to me all day and we had another argument because his brother is saying I’m mugging him off while I haven’t seen him and I haven’t spoken about the situation at all. Now he’s telling me he doesn’t trust me and all I have done is fight for our relationship and he’s read my message from yesterday and hasn’t spoken to me for then or today, and I don’t know what do to.