My boyfriend not been the same

so lately my boyfriend been ackin funny lately as in not laying his phone down starting Lil arguments when I try to ask him questions not texting me like he use to even when I called he don't pick up are he just text me he can't answer right now so I ask him what he doing in he reply with nun are don't respond I really wanna work this out with him I love him so much but I don't no what to do