how do you break up with someone you still love?

I want to break up with my bf of 8 months but i don’t know how . the reason i do is because i simply not feeling the relationship anymore . i’m a high schooler btw and i just feel like i’m losing all my friends since we’ve been together bc i’ve always spent my time at school with him that now i fee like i have no friends. i still sorta have friends but when we hang out it just feels off like our close bond died and i hate it . Another reason is since we’ve been together i slowly stopped caring about my appearance bc i was comfortable with him. And my final reason being that i just feel like i’m too young to be in a serious relationship. i should be having fun and meeting lots of people and making lots of memories. I just feel like my bf and I weren’t meant to be in a relationship and that just being friends would’ve been better. What’s holding me back though is that he told me if we were to break up or something that he couldn’t just wanna be my friend and that makes me sad bc when it’s done it’s done and nothing will be the same with him and he’s just such a good person and i don’t wanna lose that. Another reason is because i’ve became so attached to him and just comfortable with our routine of eating lunch together every day and always being together is that what am i going to do when we break up ? bc the days when he isn’t at school i’d just eat lunch by myself. My “friends” have kinda just moved on from me and started forming their little new friend groups with other people and i can’t really just join our of nowhere , one time i did and they all looked at me weird wondering why i was sitting at their table so i felt really uncomfortable. I’ve been wanting to break up with him for a while now it’s just hard bc i couldn’t do it in december bc of the holidays , nor january bc it was his birthday and the february is valentine’s day and i’d just feel so mad doing it around this time bc ik he’s gonna be sad but i don’t wanna keep going and then eventually getting in too deep. i just honestly feel so lost and cry just thinking about it i don’t know what to do or how to do it pls help