<human>: Condense the text into a few key points

Me and my girlfriend Chloe have been dating for just over 2 years. She's beautiful, funny and way out of my league. When we first started dating, a mutual friend's father stated in front of us and many others that "Chloe is way too pretty for him". Damn that one hurt bad. I keep trying to explain it to myself, that maybe he's jealous or something, but deep down I know that I'm average looking and she really is way too pretty for me.

I went on a camping trip with my mothers colleagues and began chatting to an older guy there about mundane things and he asked whether or not I had a girlfriend. I said that I did and began telling him about her, y'know as you would. I also asked about him, and he said he had a wife and we discussed the same sort of things. He then asked if I had any photos at which point I showed him one on my phone. When he saw, he said "Jesus, you sure are punching above your weight there."

And finally, me and Chloe attended an 18th birthday party for a good friend of mine. He got absolutely legless drunk and as he was saying goodbye decided to inform me that I was also "punching above my weight".

Now, I hate to be rude, and I'd never say this to them in person, but none of them are dating particularly attractive women and they are very bitter when they say these things. It's not in a pat on the back sort of tone, but more so a jealous way.

It fucking hurts reddit, and it's only made me more and more insecure. Whenever she talks to a guy at work, or glances anywhere I get extremely jealous. I can usually hold it in till it subsides but there have been times where it's caused me to get really upset with her.

I realise that I can't change my looks, but I really don't want to lose Chloe over something so petty. What can I do to stop myself from feeling this way?
<bot>: I've been told that I'm punching above my weight with my girlfriend. How can I stop it from getting to me and making me so insecure?