I just can't stand that!! I know 1000% that she saw my message. She logged in couple times after I sent my text so no way she "missed" that and it's been 2 and a half hours since I texted her. I know her for quite some time, and we are talking every day pretty much. Maybe it's a problem maybe not I don't know... It's just drives me crazy when I know someone saw my text and doesn't reply me back (when its a question of course)

What should you do in this situation? Leave it as it is? Neg her for that?