Don't overthink it.

If YOU feel bad it will make others notice one of two things.

One, if drawing attention to size either in passing or by constantly talking about it, yhis will CAUSE them to start making comparisons when they never really cared much, or even at all.

Two, women like confidence. If you are insecure, this will bleed into your behaviour even if you don't realise. You'll be overly nice, clingy, try to prove yourself in other ways. By all means be nice, show love, be the best person you can, but there's a point at which this crosses a line into being unhealthy for you, and can either push others away OR attract the wrong people who want to use or abuse you because you'll do ANYTHING to prove you're still worthy.

SO:

Never think about it again.

Its tough. Its always in society. A small number of people DO care but they're the loudest voices and you hear them even louder because it's always in society.

Every single time you think about it you cause yourself damage. It's like if you buy a new car, suddenly you see the same one everywhere. They're not actually everywhere, it's because you're thinking of and aware of this car now. All of a sudden youll see them everywhere - on the road, in carparks, youll notice advertisements, youll hear people mention them, youll even start seeing the previous model etc. The same goes - if you think about this it will be the only thing in your head and you will be harmed by every single thing in society.

If you go looking online for 'reassurance' all you'll find is harmful stuff. You THINK you're looking for reassurance but the human brain believes it is right, therefore you will keep finding things that harm you. You'll ignore fifty reddit responses saying "I'm a woman and I really don't care, it's more about who the person is and what they're like in the bedroom as a lover not what they bring with them)" and burn into your mind the three that say things that confirm your worst fears, and convince yourself the other 50 are lying and hiding the truth.