Dating during your divorce can poison the spirit of cooperation and affect your life for a long time after the divorce is final (and possibly after your boyfriend is history).
As far as the courts are concerned, you are still legally married until the divorce is finalized.
To top it off, a really vindictive husband might consider suing your boyfriend for alienation of affection.
Legal separation may be a better option if a couple is struggling financially or if a woman has been out of the workforce for a long period of time.
A period of separation will give a long-term stay-at-home mother the opportunity to become more financially stable while style able to enjoy the benefits of marriage. If your religious beliefs conflict with the idea of divorce, you are able to live separately and retain your marital status for religious beliefs. If you are a military spouse, you may wish to remain married for 10 years so that you can take advantage of benefits set up by the Uniformed Services Former Spouse Protection Act.
If you have children, then you also need to realize that it's in your best interest to try to keep a cordial relationship with your husband.
You will most likely have ongoing contact with your husband after the divorce because of the children.
This, after the decision to divorce, has been made will save the expense of a long and conflicted journey through the family court system.