Yes, you can date someone else after you separate from your spouse. There is nothing illegal or wrong about dating while married and waiting for your divorce as long as you are living separate and apart.
What is the legal date of separation?
The specific definition of the date of separation varies from state to state, but its generally considered the date that spouses no longer live together as a married couple. The most obvious example of a separation is when one spouse moves out of the marital home with the intent of ending the relationship.
Can my separated wife claim my inheritance?
The short answer is yes. A common misconception is that once you divorce, you are no longer able to bring an inheritance claim against your exs estate when they die. However, a divorcee remains eligible to bring an inheritance claim against their ex wifes or ex husbands estate, so long as they have not remarried.