idk what to do

me (f16) and my bf (17) have been dating for six months now. me and him come from very different backgrounds, but have very similar interests in our futures and now. however recently i have been more nit picky in a way, its been about a month and a half of this. its like idc if i lose him and our relationship but i also dont want to lose him. im at a loss because he is so head over heels for me, and to me hes just him. i dont want to lose my person, but idk what i can do to make myself not as checked out. and yes we have tried talking about things an doing things to respark something and nothing works