I need answers from him?

Im texting my ex. I was talking a lot and he said he fw it. Then I said I don't know what to do and he was like I don't know lol We can keep talking if you want, or if not then it was nice catching up whatever you want lol" I told him I liked talking to him but didn't want to be annoying and he said not to worry about that and was like "Dope" then he dragged the convo. We are in college. He takes some time to answer which i understand. I told him when I moved back in my roommate and her mom said they found me a boyfriend and were trying to set me up said he was cute and tall and my roommate told the guy "my roommate is a 10 and my ex was like "LMAOO she's not lying tho, that's nice of her to set you up, on the first day. then i was like "aww that's sweet" and he answered and said "Lmao he's perfect for you and the 7th floor, that's too much lmao." he used some emojis. I told him a guy came up to me and my friend and she said he was flirting with me and my guy friend was like "Aw he probably was, that's good he's nice though" and put an emoji. I told him the guy was a Virgo and I liked his life story but forgot his name and he was like “aww that’s sweet. it’s love at first sight" I told him my roommate's brother was coming and I didn't want a repeat of last year and he was like " ok ok i see you but be careful a few texts later he didn't answer for 2 days and then left me on opened for a day! he led me on then does this. Did I say something? I did talk about those guys and my last text I sent was about alcohol and I said my roommates brother’s bday was Friday and I wanted him to stay home. That’s it! He just opened it , I thought he changed and we were doing so good. Even if he was busy he wouldn’t do that. I’ve been crying all day because I’m hurt. Was it something I said? I did call him like my best friend earlier on and talked about those guys but that’s it! I didn’t think he would care. Should I text him asking what happened?
I need answers from him?
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