HOW CAN I GET MY MOM TO RELIZE I WANNA MARRY THE GUY I'M WITH SO BACK OFF AND STOP LYING ON HIM.?

MY MOTHER IS ALWAYS BADGERING MY BOYFRIND AND HE HAS ASKED ME TO MARRY HIM, LET ME TELL U MY MOTHER IS SINGLE AND IS NOT HAPPY WITH HER SELF. BUT WHY SHOULD THAT BE MY PROBLEM AND WHY DOES SHE PUT MY BOYFRIEND DOWN ALLLLLLLLLLL THE TIME. PLEASE HELP ME ANS GIVE ME SOME ADVICE ON WHAT I SHOULD DO ABOUT HER BEING THE WAY SHE IS BEING ABOUT MY SOON TO BE HUSBAND, ONE MORE THING I DO LIVE WITH HER I PAY HER RENT AND HE PAYS HER RENT. ANS SHE STILL WILL FIND A WAY TO PUT HIM DOWN!