I personally don't think you should cheat on your wife. If your wife finds out, you could lose big time. She could divorce you. She could keep the house, car, kids, etc. If that happens, your kids probably will be super upset with you too. Especially if they are girls. They will see that as a personal slight. They may even refuse to speak to you/be with you for a while.
You also could lose your job. Some companies will fire people for having affairs. Worst case scenario, this could end really really badly.
You probably married your wife, because she used to make you feel all buddly and tingly! You probably told her that you would always be faithful. She probably make the same commitment.
That said, my personal recommendation is that you find out how to be more satisfied with the wife and family that you have. There are marital councilors available. Many are free. I call them pastors. There are books a plenty: Crucial Conversations, Men are from Mars and women are from Venus, the 5 love languages.
Something you could try this month: Do 5 extra things to show your wife you love her. Find out what her love language is and do many of those things. Commit to loving your life like your life depends on it for a month. If at the end of that month, you don't see any improvement, then you can talk to your wife about having more sexual partners or a divorce. But at least you tried.