Saggitarius man, with a Cancer moon(I think)?

Just had an awfully infuriating bus journey with a guy I dated for a while. We've had our ups and downs, and misunderstandings and such but recently, we decided to put the past behind us and move ahead and be friends. Except, the last two nights we've been out socialising in the same circle and he's just been really wierd with me. Especially tonight! He decided to get the same bus home as myself and all the way home he was just really obnoxious and rude. We didn't really have a good conversation flow because he was just coming out with stupid things or mocking what I said etc. He was complaining about being tired etc, but seriously is this characteristic of Saggitarius to be so obnoxious while tired or otherwise. Or men? Why would a man be acting in such a way?