Would a having a baby force me to change for the better and give me meaning?

I am unfulfilled in my relationship, we have had problems that have brought the value of the relationship down. I love my partner but i have been disappointed repeatedly. I also do not have strength to leave and or fear giving up on the relationship. I used to be very active but over the past 2 years i have gained 50 lbs and that makes things worse. I feel i do not have reasons to do the things i used to love and i dont have much desire for anything anymore but i also feel empty. Would having a baby get me out of this blah, dull routine? Would a baby give me joy and replace my numbness?