IMHO, Even in the most normal of circumstance, 10 months of dating is rather soon to be talking about blending families.
I think you may have been granted a gift here, you are getting a sneak preview of what life is like with an active alcoholic. I would take this time and educate myself about this horrible disease.
As an adult you are free to choose, but your children do not have a choice, and they certainly to not deserve to live in an addicted household,
We are here to share our experiences, feel free to ask all the questions you need, best to have all the facts before making such a huge commitment.