what happened there?!?!?!?!?!?

me and this guy met at my mom's friend's party and we were talking for a while and then i added him on facebook and we talked for very long and once we even texted until 3am then he told me that liked me and i told him that i liked him back and the he drew a picture of a girl and tried to make it look like me and somewhere in the picture he wrote V+D and put a heart around it. Then in some time he asked me out and i rejected him and then we started talking less. But then i texted him and he said "so what do you want" and then "so what now" and then he said "ok fine..how are you" and i said " u sound like ur forced to say it" and he said " well i kinda am but whatev" and now im left wondering what happened there? after i rejected him we still talked for a couple of months but then all the sudden he is being rude? any ideas???