Gohl1231, thanks for posting. I'm sorry you're going through a difficult time.

Are you religious or do you attend a church?

Also, do you love your wife? If the answer is yes, I guess it's safe to say you're not seeking love. Would you say that's accurate?

So if it's the thrill you're going after, have you tried making things more thrilling in the bed room with your wife? Have you talked to her about that?

I think it would be a great idea to go to church regularly, not only to strengthen your religious convictions and relationship, but also to set an example for your children.
Since you do love your wife, but are looking for that "thrill" again, why not try to find that with her? Now, being a young mother as described in your post, it sounds like she may not have had much of a "thrilling" life herself before becoming a mother. A great way to rekindle romance and excitement in your marriage would be to help her have time to develop who she is as a wife and mother. Offer to take care of the kids one or two nights a week - feeding them, baths, put to bed - and giving her a break and time to do things she is passionate about. Try to hire a babysitter (or swap babysitting with a neighbor or friend) and go out on dates.
Once your wife is taken care of emotionally, spiritually, and mentally, it will be easier for her to help meet your needs for thrilling nights.

My good man, I have walked your walk and I am 43.  You do what you do because of whats going on at home.  For me and my wife it actually was the kids.  We were not able to spend anytime together and always had the kids.  "US" time is essential for any man.  I started to miss the hugs, the kisses, and the little things from my wife, and when you are not getting this at home, its interesting when someone else starts to show you these affections.  Church is a great start for both of you and I would also say, get a babysitter on the weekend and you too make time for dinner/movie etc.  Do not let the fire go out.  I am regretting this right now.