My girlfriend doesn't know she's hot, so now she gets hit on and doesn't even notice?

Anonymous
So I love my girlfriend, I really do but she doesn't know she's hot. When we met she was chubby and short, just the overall average looking girl. But then she lost a lot of weight and now she's super hot. She got to keep her boobs and her but so she's that perfect combo of like thin and curvy, it's great. But she doesn't understand that she gets guys attention. In her mind I think she still thinks of herself as the chubby she girl. She's still shy but now she's a babe. So when she guys are checking her out she doesn't see it. Or when guys walk up to her and pretend like they have a question just to flirt she also doesn't get that. It's hard.

The other day we where at this market place and I went into one of the stores to pee and she was waiting outside. I come back and these 2 guys where obviously trying to pick her up. She didn't flirt back (they where pretending to ask for directions and she just bluntly told them, while barely making eye contact). When I asked her about it later she said they where just asking for directions.
Also now that she's thin and stuff she likes to wear shirts her friends wear, but when she borrows it her boobs look way bigger, and everyone checking her out but she doesn't notice. My friends mention that she's hot now and so I have to stay on alert with them. I just don't know how to explain to her that she's pretty. I tried but she still thinks she's fat or I'm just over reacting. How did you guys bring this up to your girlfriends.
My girlfriend doesn't know she's hot, so now she gets hit on and doesn't even notice?
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