bf issues, i need advice :(

(if you're friends with me and you see that i also posted this on my bulletin, i just copied and pasted it from there bc i can't type all this again lol)

this might seem like too much of a personal problem to be posting on the internet, but i need advice </3

i don't know what to do :/ i've been with my boyfriend for 10 months now, and i love him, it just feels like we've kind of lost our spark and i don't know if that's a sign or not if we're meant. there's a lot of reasons why i feel like it wouldn't be a huge deal if i did break up with him, because i feel like he might be understanding. i've only just turned 15, and he's still 14, so we're really young, and we'll be starting high school in a few weeks so there's just a lot of change going on lately, and it's honestly just taking a big toll on my mental health because of the stress. i feel like all this worry about our relationship is stressing me out even more, but i just can't make a choice yet, because i think i still love him. i've mentioned this to him before (not about how i'm considering breaking up, but just how i feel like things aren't the same), and he agrees. for a while we tried to have actual conversations more, because when we call we don't really actually talk often, we just sit there and do whatever and occasionally talk to each other. usually he'll be playing video games and i'll be spacing out. pretty much every single day i start crying on call just because i'm so stressed out, and my emotions are all over the place, and also later on call he'll always start crying because he's worried he's not doing enough for our relationship. he's done so much for me, and he really loves me so much. he's my first boyfriend, and we're both each other's first kiss. i'm also a little worried that if i do break up with him he might get more depressed, which worries me because he's told me i've saved him so many times without even realizing it. i just know that if i do break up with him i'll regret it, but i don't know if staying is the right choice either, just for my own mental health. i feel like i want to have kind of a fresh start going into high school, a clear mind, and just focus on friends and myself and all that, since everything will be so new. new classes, new teachers, new environment, new people. in a way, i feel like if i stay with him it'll be holding me back. but at the same time, i think i'm still in love, and i don't want to leave him :( i also feel bad bc he told me a couple of weeks ago that he bought me a 500 dollar promise ring that he had been saving up for since we started dating, and all that money's just from chores since we can't even get jobs :(