Relationship advice

We have seriously turned into roommates. I feel fat, gross, and overall unattractive. He has also put on some weight. We just don't seem to have a spark anymore and go months without sex. I've decided to work on my health and try to feel better about myself but I'm just SO tired all the time! Anyone have advice or some words of encouragement? All we do when baby is asleep is watch TV, go on our phones and fall asleep 😭