Are you a SAHM or a working mom

My son is 7 months old and I've only been back at work for about a month and a half. It's been hard. My heart aches every morning. I'm gone from 7am to almost 6 in the afternoon. My home suffers. And I feel like my baby is suffering. I have nothing against working mothers. I think everyone has there own pull to what they want out of life. But I am struggling. My fiance says I can stay home with him but I almost feel ashamed. Everyone I talk to this about says I need to work and not be lazy and I need to have an identity outside of being a mom. Does anyone have any advice ?