Low sex drive

Hey ladies , me and my boyfriend have ben together for 7 years we have 2 kids together he has always had a high sex drive mine used to be okay at the beginning but now its so low like i feel like i dont need it at all ! Its so hard for me to get turned on and i feel bad cause he thinks its his fault i cant get turned on but its really not its just as much as i try or any position i cant :( i really love him and dont want this to be the reason this relationship ends :/ HELPPP PLZZZ