Im breaking up with a guy over text, help.

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I need advice, I'm ending it. Tonight. He has been disrespectful and I'm not okay with it. We've only been together for two months and he has ignored me for over a week and a half because of one small fight we had over text. Because of this and some other reasons, I'm ending it. He won't even text me and he ignored me twice so I can't do it in person if he won't even fucking talk to me. Should I make it really short? Such as "we're over" or "we are done." Or should I be like "micheal, this isn't working, you ignoring me and not talking to me has hurt me and I'm not okay with that. Unless you actually want to try and work this out then fine but if not we are done, over, lose my number."