I am not married, but in a very long-term relationship, and I've had a couple of infatuations along the way. I know how it can feel like you're under a spell. It can even feel like you are truly in love. Being with one person year after year can get dull. Along comes someone who just floats your boat like you've never experienced before. I've been there. In my case, it was someone I saw at work. We flirted like crazy for a while, and then called it quits after he transferred out of town. Nothing really happened, but for a while I thought I would give up anything for this guy. I thought he was the most magnetic human being I'ld ever met. Then he moved away, and he ended it. A few years ago, I looked him up on line and found out he had died. Reading that was like reading a weather report. What I had thought was love was really only strong chemistry. Over time it faded away to nothing. I'm still with my sig. other and very glad I am.

So I'll be the last one to be judgemental. You can't really help how you feel. However, don't let feelings dictate your decisions. Feelings can be transient, no matter how intense they seem in the moment.

All long-term relationships have periods of seeming like all the magic is gone and even can become hostile for a period. But I've seen couples ride that out and end up so glad they did.

Think of what you owe your children. You made a commitment, and this doesn't sound like a big enough reason to walk out on it. A new relationship might feel fantastic, but that would be temporary. The Honeymoon period only lasts so long. Ask Brad Pitt.

Work on your marriage. It sounds like your wife and you can talk about difficult things. Let her know that you want to make things better and offer to do something specific toward that end.

Don't go telling your wife that you have "feelings" for someone else. Some things are best kept to yourself. You can acknowledge the feelings in your own heart, but realize they are based partly on fantasy and not really knowing someone. Think of something nice you, your wife and the girls could do as a family. Go somewhere and stay in a hotel. Explore something new together. Get a change from looking at the same walls every day. Make some special memories. Get creative and think up some ways to get out of the usual routine.