I don't know anymore

I'm just so confused anymore. A year and a half with the man I'm madly in love with and we have a 5 month old... nothing feels the same. We used to have sex every single day. We hadn't had sex in a little over a week and tonight it took me an hour to even try to initiate it and get him down to his boxers. Like he wants nothing to do with me. We used to make love all the time and our sex life was so intense. We had sex for less than like 5 strokes. He's been ignoring me lately. Doesn't call me beautiful anymore nothing. Our relationship went from amazing to shit really quick and idk anymore.. what's wrong with me