He Rarely Keeps the Conversation Going
A guy who is interested in you will try to keep the conversation going, especially very early in the relationship. It's very annoying when you're texting with someone who takes hours to respond. And many times, he has time to post on Facebook or Twitter, or share stupid pictures and videos on Instagram or Snapchat, yet doesn't take a minute out of his day to see how you're doing. Even worse is when he finally texts back, it’s usually something lame like, “Not much, you?” or “That’s cool.”
A guy really likes you when he holds a conversation with you, when he asks questions, when he wants to get to know more about you. If he can’t, he's probably not going to keep your interest anyway.