My boyfriend never makes time for me...AIO?

sigh okay, basically I have a boyfriend, his name is Fizz (I won't say his real name for privacy reasons, but Fizz is his online name) and he's like PERFECT for me in every way, he's funny, he's kind, he's sweet, he's caring, he's pretty, cute, loves My Little Pony, can voice characters I simp for, and has other people (d.i.d.) who I LOVE and they love me! But.... I try and spend as much time as possible with him, like every second I'm awake and not busy (it's mainly just being at school because my mom won't let me bring my phone even though they're allowed at my school lol) and yet he's ALWAYS busy! Like I get he's just living life, (examples: school [phones aren't allowed at his I don't think], work [not a job, like housework], and personal matters) but he NEVER makes time for me and he keeps saying he will (in an angry-ish tone) every time I bring it up! I feel like he doesn't have time for a girlfriend but we love each other a lot! Sure we were both Poly and with multiple people when we got together, but now it's just us dating each other and I feel lonely..I vented about this to him last night and he's just pulling the same "I'm trying my best", but when we do chat it's usually 8-10:30 my time zone!! I told him that at some point I'll have enough and he'll need to make the choice of ACTUALLY trying to make time for me, or I'm leaving. I don't WANT to leave him, I LOVE him (and his alters) sooooo much!!!! Like I said he's such a great guy but I just don't even know what to do! Can someone PLEASE tell me I'm not overreacting??