Breastfeed or Formula?

I know this is a personal preference and as long as baby is fed and healthy both are good options. I want to know how to decide? With my daughter she was formula fed and has been lactose intolerant with other food allergies that make meals difficult to plan for her since birth. I want my boyfriend to have the opportunity to help with feedings and am unsure of the things I’d have to cut out of my diet that I may selfishly not want to. Any opinions or advice from those who have would be helpful 😁