Am I tripping ?

So I had this thing with this guy, I have no idea what we were, I saw us as a couple but he kept me a secret anyways that’s besides the point. he “broke up” with me back in November, he didn’t give me an explanation as to why he just said he was done and then he blocked me. So obviously me being hurt I blocked him on Facebook, because that was usually where we talked. So last week Sunday I got a friend request from his best friend and he started talking to me, telling me that he was interested in getting to know me and blah blah blah and that bullshit guys say, I mean I didn’t tell him that I knew that that was his best friend. Am I tripping or is that just me being stupid ? Could he be behind him messaging me? 🤔🤔