Please please help I don't know what to do

ok i have been married for 7 years and with the same partner for 12 years, we have home, car and all the normal bills as-well as debt (who doesn't these days) i have always thought of myself as being happy in my relationship, We have NOTHING in common. i have met a friend of a friend and we began chatting and i believe the term is we are having an emotional affair we have connected on a level i never thought possible and she feels the same. we went for a meal and chat the other day and it became clear that i didn't know what happiness was. I cant stop thinking about this women and get a sick feeling when we do speak, im in tears as im writing this as i really don't know what to do. 1, stay with my wife who i have nothing in common with and talk about little other than business and studies? 2, Knock it on the head to be with a women who has made me see what happiness really is? Please help and give me the advice i sorely need. just to point out NOTHING has happened with this women we have hugged but we have NOT kissed or had sex.

Hey i am probably a little late but i just seen your question now. I wanted to ask you how long you've been with your girlfriend and has she ever cheated? Does she treat you right? And are you sure you are 100% over her and you want this other lady? And is this other lady truly a good woman who genuinely likes you? What if you break it off with your girlfriend only to find out the other woman isn't who you thought she was? I think you should go with the woman who you like best. and make sure you truly like her and its not just lust at first sight! (aka a temporary fling) And if you've already made your decision can you let us know which one you picked and what happened with your EX? I'm curious to know lol.