Or, Alice is a through-and-through Lipstick Lesbian, but the characters treat her like she's the manliest person they've ever met, solely on the basis that she's attracted to girls.
Some days, Alice wears a dress or skirt, some days she wears pants. Some days, she drinks beer. Other days, she drinks Sex on the Beach. On Monday nights, she watches football, weekday afternoons, she watches a Soap Opera.
Alice's friends tend to be guys, and when she's with them she tends to join in with the blokey atmosphere. But when she goes on the pull, She Cleans Up Nicely.
Alice is a very girly whether she's a lesbian or not.
Alternatively, Alice has a gender-neutral personality.
Reconstructed: Alice figures herself out and pulls herself together. She is happy with how she chooses to express herself, and stops caring what people might (or might not) think. And she also learns that she doesn't have to put others down simply because their interests are not to her tastes.