Not attracted to my husband

I have a 1.5 year old and ever since he was born, my sex life has been horrible. Between the stress of taking care of a newborn to our son waking up multiple times at nights, my husband and I are always pretty exhausted by the end of the day. He definitely tries to initiate sex more then me but I’m just not into it. Sometimes I look at him and I am not romantically attracted to him. He is a wonderful person and is an amazing husband & father, but i dont know why I feel this way. Does anyone have any advice on how we can bring the spark back? I want to feel like I’m crazy in love with this man but thats just not the case right now 😔