Not sure what to do here

I just asked my bf a semi-serious question, and he hasn't responded. I'm assuming he just fell asleep, since it was getting kinda late. But he was pretty consistent with replying up until so Idk what to think. Granted I tend to over think things a lot, so maybe things are actually fine and I'm just overreacting like usual?? Idk I just mainly needed to vent. But if anyone has any advice or insight, that'd be really appreciated! Thanks in advance!