I agree with the previous response - ask you husband for a "time-out". There is so much excitement but also a lot of danger in longing for someone new in your life. It is more difficult to make an existing relationship work but in the end you will have more certainty in your life. Your husband is after all the father of your children - would the other man love them as he does? I experienced three stepchildren in my life and although I tried to by a good mother, often resented the stress they put on the marriage.
Good luck.