<human>: Could you distill the essence of the text into 1-3 sentences?

So I and my girlfriend have been seeing each other just for a month or so, all things have went fantastically fine and the chemistry between us is just amazing. We talked about what people behaviours irritates each other, when the conversation lead to question if there are some things that has been irritating me in her. I said that of course there are but those are not the things that must be shared to other person - after all, things that irritates you are, in most cases, just one's personal opinions, not the things that are wrong in other person.

I tried to keep my thoughts inside my me, but she wanted to know what is THE thing that itches my head about her. I knew it would not be very nice thing to say and it will affect to her, us and our relationship - for an unknown time period. 

I tried to seek nice words and how to tell this to her, but after some mumbling and awkward moments, I heard myself saying:
> You eating, it is not the most beautiful thing to watch

You can imagine how my tries to soften my words did not help the situation that much and did not wipe off what I had just said. It felt like someone had just poured baskets of cold water between us and like there was some very tight rim around my head. Rest of the night was, well, after a great weekend, not that great.

After all, we are still talking, we are still having fun and still interested in each other - but the anxiety that came along with the topic will follow us for some time, it is sure.
<bot>: Said my girlfriend watching her eating is not the most beautiful thing, led the awkwardness in our relationship, and maybe I am laughing for this some day.