<human>: Can you summarize the given text in a few sentences?

I've been with my new girlfriend for about half a year now and it's been really great. Not always smooth sailing but as a whole it's been great. It's surprising that it actually started because I am pretty dense and didn't know she reciprocated my feelings until it was almost too late. Still, all's well that ends well, right? There's just one thing that's been increasingly grating from pretty much the get-go. 

She's been constantly repeating how lucky I am to have her, that I'll never find anyone like her, that no one will ever love me like she do and others would've dumped me a long time ago (since I'm a nerd). After a fight she added in that I was *really* lucky she chose me because she had other prospects at the time and I'd be really dumb to give us up. The stupid/dumb/idiot comment is now among the other regularly.

There's barely a date or a meet up where a variation of these sentences doesn't come up. Usually it's in the flow of the lovey-dovey talk (that I find sickening on a rational day but it's hard not to do when you are still actually lovey-dovey :) ) and never with an accusatory tone as it might seem in the description. In fact, it's often so hidden that I don't register it until well after she said it. But the thing is, these sentences are happening too often and she's way too smart to just accidently say it like that.

What I want to know is... am I just overthinking things? I'm not particularly experienced with relationships nor with pillow talk. Is this meant to be romantic? I don't want to bring up an issue with her that might cause her to stop being frank and honest with me or force her to overthink her every word because I am too sensitive. Or is this an actual red flag? I kinda do feel shitty and I can't help but wonder if she's trying to put me down
<bot>: gf constantly repeats that no one will ever love me like she does, makes me kinda feel shitty. Red flag or am I just being overly sensitive?