Depo not wanting sex!!!

I have been on the depo for almost a year now.... I feel like I just let st interest in sex let alone playing around... I feel so bad because both of us at one time couldn’t even go a day with out sex or at lest messing around... I know a lot of it has to do with once we had baby number 2 it stopped being every day to every other day... to now he’s lucky if I want it weekly or monthly... why do I feel this way... any ideas to help me???