Need advice with my guy "friend"? Please help!!?

[justttcuriosss69]

((i know its long!)) Ok so im a girl and I started talking to this guy on twitter. He's my best friends(that is a girl) best friend and she wanted me to weird him out so I was just saying weird things to him and he thought they were funny and stuff. Then we started direct messaging and he would reply and I would just ask him some random questions and some actual questions that I was curious to know because i was trying to get to know him. We started talking almost everyday. (Sometimes he would message me first) And my best friend was like omg he's so weirded out by you haha. And i was like whatever and I asked him if he thought I was weird or annoying and he said I wasn't so I was like ok that's good. Then my best friend was like you guys should meet! and stuff and i was like ok that sounds cool since he seems nice and funny, so I've been asking him to hangout at the mall or something (all 3 of us) and he kept saying no and that he hates the mall. So I recently asked him because we were trying to plan the weekend and wanted to know if he would come and obviously he said no. And I was like why? We all hate the mall just suck it up and come! (Because I thought the reason he wasn't coming was just the mall) but then he says "its not the mall just leave me ALONE!! I mean in the nicest way possible" then I responded with "hahahah k" ( because he could think I'm joking or could be serious)
Ps we are both sophomores in high school

I don't know of there's a family thing or something going on that he didn't tell me?
Does he just want me to stop talking to him all together? Or just about going places?
I don't know if I should keep talking to him or not? PLEASE HELPP!!
-thank you so much(:
He doesn't go to my school, he goes to my best friends school. I don't really want to tell her about this because I don't know how she'll react or what...
I have been bugging him kind of a lot to hang out and it is mostly my fault, but was it that annoying that he doesn't want to talk to me anymore? And I used to go to the same school as him in elementary school but we didn't even know each other and then I moved to a different school, so we have really never met before