My boyfriend is very immature

Me (15f) and my boyfriend (14m) have been dating for over 6th months now. I know we are young so I didn’t expect him to be very “mature” but he is so fucking immature. He never EVER talks to me at school. we have one class together and in that class we have a lot of free time. Instead of even just coming over and saying hi to me he spends his whole time with his friends playing a game in his phone. And trust me I have tried to talk to him but he always just ignores me or says hi then turns back around and talks to his friends. It’s so fucking annoying. I’ve tried to talk to him about this so many times and it never changes. Another thing is he doesn’t take any conversation seriously. Like literally today it tired to talk to him about making fun of my interests. (Which, side note is something he continuously does. ) And every time I talk to him about something serious along those lines he just makes up excuses or tells me what I “want to hear” instead of just saying sorry and fixing it. Another thing is all he wants to do is lay in bed and cuddle. Which, I get it, it’s nice and all but whenever I say like “oh we should go for a walk” he always says no. And, whenever I do talk to him at school or even just in public (or more in the presence of his friends) he doesn’t look me in the eyes EVER ( or even look in my direction). He is a good boyfriend but those things really piss me off and all my friends are telling me to break up with him but it’s really just those issues that he just won’t fix. Everything else about him is perfect. He’s a good guy, my family loves him, he’s friends with a lot of my friends and close with my cousin. Idk he seems like the perfect guy but he never takes anything seriously and doesn’t fix anything I say bugs me. Sorry this is so long thank you for reading all the way.