Ridiculous dress codes!

Abby
So I've had to dress more conservatively at home once I started going through puberty. I get that. 100%. But now that I've become more confident with my body, I want to show it off and celebrate it more. Ig. But my parents don't think I should show off my body and my boyfriend doesn't either. He hates some of my tight clothes (and I don't have a lot, like at all), or when I wear my high waisted jeans. I've talked to him about it, and he just says that he doesn't want guys to look at me. Which I do understand. I just need to explain to him how I feel. 
The problem is, I don't wven really know. I don't know why I want to wear shorts or cropped tops or any of that. I know that when I have to wear the shirts longer than my finger tips (I have, like, monkey arms) and tank tops under my cropped tops, I feel childish, but I don't know why!! Does anyone else feel this? Is it just because I see that kind of fashion everywhere, I want to fit in with it too? I also find it attractive. But I don't want my family or my boyfriend to think it's because I want attention, because I don't. It's for me. M I ring vain? Or attention seeking? I'm just confused with my own thinking ig and need help clearing my breaking. And help finding a way to explain myself.