Boyfriend

I’m 14 going on 15 in December (quite a way off I know) but I have a kind of complicated relationship with this lad that’s 15 going on 16 in August so he’s two school years above me but like we broke up 3 weeks ago now I think and then we’ve kind of gotten back together but he keeps asking for nudes and things and I say no but he keeps saying that he’s gonna have to leave. And hes like it’s not you it’s me and I’m just so confused on what to do cuz we really do love eachother and he’s really sweet and I see him every Wednesday. Can anyone give me advice on what to do ASAP??? I don’t want to lose him again.... but he is sending back