BF (19M) rarely texts me (18F) what do i do?

TL;DR BF and I don’t agree on how often we should text. I text him back every time he texts me and i’m the only one that ever reaches out, but he rarely texts back. we hang out often, but the days we don’t he barely talks to me

Genuine question. I 18F am a very dependent person and always text back immediately. my boyfriend 19M is not very good at texting back at all. we’ve been dating about a year. He is online a lot while I am on delivered, and he just ignores my texts a LOT. It makes me feel really bad and I’m not sure what to do. We hang out almost every day but the days we don’t hang out, he barely speaks to me. I talked to him about this and he said it’s not a big deal and to leave him alone about it, but it’s been bothering me lately. most of the things about our relationship that bother me are pushed to the side, and he just tells me to act normal and it doesn’t matter. iwhat should i do? help!

I do understand that I don’t have to depend on him for my happiness by the way. I’m a happy person and i have friends, but even when I am with them, i find myself stopping whatever doing to text him back when he won’t text me for hours.