When to introduce kids to new partner

Candace Rogers

I have an almost 2 year old little girl, and my boyfriend has two boys, 3 and 4. We can both definitely see this turning into a very serious long term relationship, though we've only been together a month, we both have never felt this strongly about anyone before, and have an amazing bond. I have not had a significant other since leaving my daughters father and he(so) is in the same situation pretty much. When would be the right time to introduce my daughter to my boyfriend and his boys? Should I do it separately, boyfriend then all three once they're comfortable? Is there a milestone to hit in the relationship before introducing our kids? Any input is greatly appreciated! Thank you!