<human>: I think I've always had quite an insecure personality because of highly critical Asian parents, and being a huge academic and nerd when I was little meant not really focussing on my looks hence was a bit of a wallflower till I graduated etc. I have been lucky enough to be blessed with good genetics and I live a healthy life and now wear makeup and do my hair and wear decent styled clothes, so I think I'm okay physically. I have my hobbies of reading, movies, dance, music and acting, so it's not like I think I'm a boring person. 

However, I'm plagued by inadequacy and fear of being left by my boyfriend. How come when I was single I was happier with myself? I think we have a good relationship, and he always praises me and tells me sweet things and is active in my life. But sometimes I see him flick through photos of models on Instagram in front of me, or comment on hot girls and it makes me so sad. I told him that and he said he'll be more aware, but I'm more upset that he has these thoughts at all. I don't even think about other guys. And he's the one who says he's in it for the long term! Is this just a guy thing? He and I are 21 and 22 respectively.

Can you provide a brief overview of the text?
<bot>: I am more insecure about my adequacy and attractiveness as a person more in a relationship than when I was single. Is this normal? Aren't you supposed to be feel loved and special in a relationship? Am I just really insecure?