Why didn't he answer my text?

[Naomi]

He said he wanted to see me again and he said "see you later" when he dropped me off on Sunday. Last night I texted him saying "when do you think we can hangout again?" And it's now the next morning and still no reply. I'm pretty sure he has his phone because on his Facebook profile it says he was online about 30 minutes ago. I don't get it. I know he's not that into texting but I would think he would at least try to reply. It's making me kinda sad because I really like this guy. Why didn't he respond?
Dude, im not going to spy on him lol.
I don't think I'm being desperate at all, it was a simple question I asked him. Desperate would be texting him more than once after he didn't text me back