Insecure relationship?

[gtwasdjwn]

My boyfriend (29) and I (23) have been together for almost 3 years now. We have a dog together, have moved into our second home together, to our friends we have the perfect relationship. We do everything together, he puts me before anyone and I do the same for him. We speak about marriage and children openly, we can’t wait for the future BUT sometimes I find myself contemplating everything. I don’t know if that’s just me being female or it’s the insecurity in me.
I always feel like I’m never, ever good enough for him. I find myself resenting him and causing arguments about nothing, he won’t have done a single thing wrong and I will go in a sulk and want to leave him. I love him dearly but I also feel like I can’t be myself around him sometimes, I fear being judged. I could never get changed in front of him or god forbid he walked in whilst I was showering or in the bath, I think I’d die. Is this a normal feeling? I feel like he’s always looking at me thinking I’m ugly or fat (if I’m being rational, I am neither of those things) but I feel like he just compares me to every Instagram model, to every other girl in the world.
HELP ME.

Build your own self esteem and confidence. It sounds like you are overthinking this. Lockdown boredom may have also impacted in many areas? Not sure if you are normally busier in pre Covid times and had less time to analyse? Learn to love yourself. Mindfulness, exercise etc

It doesnt seem the relationship is insecure but it does seem like u are.
Iv had this issue too. And if u dont love urself itl be harder for someone else to love you as ul be creating negative situations out of nothing. Sometimes it is better to be in a relationship when u are in love with u first as u wont ever feel all these anxieties that could potentially ruin the relationship.

I find myself resenting him and causing arguments about nothing, he won’t have done a single thing wrong and I will go in a sulk and want to leave him. I love him dearly but I also feel like I can’t be myself around him sometimes, I fear being judged. I could never get changed in front of him or god forbid he walked in whilst I was showering or in the bath, I think I’d die. Is this a normal feeling?

No, not normal at all. Generally, if you're having sex with someone, you can talk to them... What has he done to make you think like this?

Is your lizard brain telling you that something is wrong with him?

How do you feel when you are away from him?

You say he hasn't done anything wrong but why is your confidence low? Has he done something in the past to make you feel insecure? Does he compliment you?
Whats more important is living and being happy now in the present, all thoughts that everything will be ok when you're married with children with him is fantasy, it can only happen if your truly happy.

I do feel for the younger girls today, social media eh, with its perfect images and girls contantly trying to outshine one another, whose the most poular, the pretiest, the thinest, it goes on.

I think its so easy for girls to get swept up in this competitiveness and men just lap it up.
It's like some huge industrial scale triangulation going on with girlfriends and wives constantly feeling less than.

Unles he's an arse and actively making you jealous with stuff like this, maybe you have become fixated on the things you don't like about yourself.
Body dysmorphia is rife amongst the young, maybe some councelling could help to re build your confidence.