What does it mean when your girlfriend doesn't text i love you back two nights in a row and says she fell asleep?

She fell asleep! ~*~*~ Give her the benefit of the doubt. Maybe she really did fall sleep. Has she been stressed or tired lately, not herself? Maybe she's getting sick or maybe her time of the month is coming up. Did something happen between you two? She might just be a little pissed still and wants to calm down a bit before talking to you again-- Which is good, it means she doesn't want to blow up at you. On the other hand she might just be thinking if she wants the relationship to go on or not, and doesn't want anything else to happen between the two of you, so certain events won't confuse her