Advice please?boyfriend help?

so I just recently got back with my ex of like a year and a half and I love him alot snd everythings going smoothly right now,im happy.but we're having little issues of like him not telliing me he loves me enough and I asked him for his facebook password and he wouldn't give it to me.it upset me and idk if these are things I should leave him for.he's hid things on his facebook before so I'm worried.i really love him and want to make things work.does him not telling me he misses or loves me as much mean he doesn't care?