What Should I do?

So me and my boyfriend have been dating for about 3 and a half months and he seems to really care about me. But for the last couple weeks, he would send me like 2 messages a day and we can't talk in person because we live 25 minutes away from each other and we can't drive (I'm 16 and he's 17). It seems like he's ignoring me and he says he's barely on his phone anymore, but he posts videos of his friends on snapchat or look at more story but won't text me back. I don't know if he's talking to another girl or if he just pays so much attention to his friends that he won't text me back. My friends think that he just wants to fuck and I should just break up with him.