So there is this guy at my gym whom has been checking me out and vice versa for a week or so. Well we started talking one day and the next day I got his number. Well we texted a bit, and kind of talk in the gym the past few times. Well last night he wasn't really into the conversation, and I didn't talk to him at the gym today and he didn't make an effort either. How can I get him to be more interested? Any texting advice?