Working with someone you are in a relationship with and defining boundaries

After 17 years in an independent line of business, I decided to join my boyfriend in his company. The money, benefits and working together in building and solidifying his business was/is attractive to me.

I have made a lot of changes and restructured the company and culture and it has consumed A LOT of my time and life. The boundaries between work and personal are not really strong and aside from burn out, days need to be structured and built differently for life to happen and be enjoyed. How do I do that?

Also, we have not made public our relationship to our work team and not only does it feel like lying but our corporate work and decisions are being tainted by this.

I have considered not being there anymore and doing something else to be in truth. How do I work through all this, please?