How can we make up?????

okay so me and the guy r not rlly dating we r more like FWB... I am 13 yrs old and my now former friend texted my guy friend saying that I was talking crap about him and that I hated him andnever wanted to seee him again. In about 10 mins he txted my phone and asked me what my problem was and I asked him what he was talking about and he said you know what im talking about and I said NO i rlly dont will you juss plz explain ur so upset and he said ur friend texted me and I said txted u what?? and he said ou already know! dont play stupid! and I replied seriously ur really upsetting me rightnow! and he said whatever I dont care and I said see told u ythat u nvr rlly cared and he said what u NEVER ssid that and I said I have said tht in EVERY argument we have EVER had and he said yea whatever sure you did im done with this and I said fine by dont talk to me ever again and then he stopped texting me. I REALLY wanna make up with him it has been over 5 weeks since this happened and I miss him so much, How an I make up with him? And I really love him..