Should I divorce, leave my wife and kids for this new love?

i dated my spouse for over 8 years and then married her, we've been married over 18 years, a total of 24 years, during this time i have never been nor tought about been unfaithful, marriage has been good and we have kids. she has been my only girlfriend. recently i met another women and we became very close friends, from that it went to the next level. i feel alot of emotions i have not felt in years for this new women. i miss not talking and being with her, i often think about leaving my wife and kids as i feel empty when not with the new woman. i only known her for a few months. what should i do? i don't feel the same love in my marriage, or could it be that with her everything is so new. i feel lonely and empty when not with her, i realize this is not fair to my wife. i feel my current relationship with wife is more of a friendship than a pionate love. am so confused, i know is not right to have an affair. should i go with this new love and women or sitck to my marriage? has this happen to any of you? why can't i feel the same thing for my wife?