Why does he not make the effort?

Ok so, i am having problems with my relationship, however, he doesn’t see it when i arise some of these issues. So is it just me? Am i viewing this relationship far to black and white- he doesn;t make effort to kiss and intiate sex with me unless i do it, for quite sometime now.(it was never like this a few months ago)Or just actually showing that he loves me and cares for me. Im trying to make myself think that this is just how he is, or that he is just very comfotable and takes me for granted,but whenever somthing doesn’t feel right- like i am always making the effort to see him, contact him, etc, i have this hideous knot in my stomach, i shouldn’t feel like this and i don’t want to let him go, i have given him oppurtunities to leave and be honest with me but it hasn’t happened, which is a relief, because i love him to bits, i just wish he would show it more, what do i do? sorry this is so long.