It doesn't matter how much you love him. It doesn't matter how lovely he is, how helpful, how understanding, how much of a feminist he is. It doesn't matter how equal you are. It doesn't matter if you would move heaven and earth to be with him.
Always maintain a degree of independence. Have some money that is yours and yours alone. Maintain friendships and interests that are nothing to do with him. Hold on to your career through thick and thin. If you have a burning desire to be a SAHM or if childcare costs would eat up your entire earnings and therefore you feel being a SAHM is the only option open to you, know this: holding on to your career is still more important. Go part time if you want to spend more time with your child, let childcare costs eat up your earnings. It is better to keep one foot in the door than to let it shut behind you. Keep being you, even if you think you are happy and fulfilled as a mommy.
Because you never know. One day in the far distant future, that lovely man you fell head over heels for might just turn out to not be the Prince you think he is. And if that day comes, you don't want to have spent the last 30 years dependent on him for everything. You don't want to be without a career or any means of getting one. You don't want to have nowhere to go. You don't want to be floundering about trying to remember who you were when you were young and independent with friends and opportunities.
That's all. I expect people will heap scorn on me. I can only point out this isn't AIBU. I just wish someone had given me this advice 30 years ago and I had been sensible enough to listen and act on such advice.