. OKAY, so I have a theory. Having rewatched all of the Sanvers scenes from the last episode, I can only conclude one thing which is that Maggie was not aware of how Alex actually felt about her. Beginning of the episode she walks up to her as if nothings wrong, she doesn’t quite seem to understand why Kara is clearly ready to murder her, and she opens up very fresh wounds with Alex. Maggie isn’t dumb. She knows, I presume what it’s like to be rejected, and she’s not callous either so if she’d realized how much she hurt Alex I think she would have let it be a little longer.
Later when they’re talking in the parking garage or whatever, she’s fine until Alex says “Because I was sure of one thing, and that was my feelings for you.” And like right after she says that, Maggie’s whole face changes. It’s then that she realizes that Alex didn’t just have a baby gay crush. It wasn’t just her liking the first gay girl she could find. She genuinely liked her a lot. And when Alex walks away she watches her go and she looks kind of dumbstruck like she’s not quite sure what just happened.
And finally, at the apartment scene she finally seems to get how much she actually hurt Alex because she’s a lot more careful about her words and about what she’s trying to convey. Also after she says that she hopes one day they can be ‘friends’ she literally looks like she swallowed a lemon. She doesn’t want to be friends, and she knows that Alex doesn’t either but she also knows that it’s too soon.
Maggie didn’t know. There’s been a few people who have mentioned that Maggie probably doesn’t think she deserves love or is lovable after the way her last gf broke up with her so that probably translates to Alex. She doesn’t understand at first that a beautiful, smart, wonderful woman like Alex might actually love her.