i texted my coworker last night before i went to bed just letting him know i would be coming in late on Thursday and he texted back no problem, have a good night. It just sounded so serious than how he is at work. Its not like i wouldve texted back anyway if he had just said no problem. I don't know he's just different at work so i expected the same vibe from him over texting. But yeah does a guy want nothing to do with you if he says have a good night.