"how do i explain it to him"

the explanation will go over his head

you'll have to be bland and watery with your words

you'll say "i love you but i can't do this anymore"

he'll look expectantly at you

but all he'll understand is that you are giving up

not that he has emotionally beaten you to the ground

not that he will never be able to love you as much as you do him

and it will feel like a long f
                                                 a
                                                    l
                                                      l,
                                                        your adrenaline will frighten you

but what you must learn is that

love is give and receive

not give and give and give until you have nothing left

he won't understand that

he'll argue that you're just too demanding

but isn't that always his response?

to blame you?

Leave him and find yourself.