Newbie - not sure what to try

Is it broken? Not sure, a young 40 something, been married for 12 years, have 2 amazing kids, successful career, thinking all the plans were mapped out. Just fallen back in love with my wife after many years being too focused on work and kids only to find out she doesn't feel for me in that way anymore. Is it normal, a phase? We are not unhappy, have a great partnership, are an amazing team and so much to lose if we split. Guess I'm looking for someone that's been there, can offer some heartfelt advise. I'm a sensitive fun loving man, does everything I can for kids and at home, have many close friends and family, just not sure if I feel ready to speak to any of them yet about this :-). Thank you.

Hi I haven't been where you are but how do you know your wife doesn't feel the same anymore? i mean did she actually say that? Or did she do something to give you that impression?

We've had honest conversations about it, she told me, last week, over the past few years her feelings have changed to be more of a friendship and at the time she resided herself to 'this is how it would be going forward'. I'm just not sure that's good enough for her anymore. The issue is so much would change if we split.... does the choice of passion with someone else out weight the life we have? Everything would change (we don't make each other unhappy). Guessing couples together a long time go through 'phases', does anyone have any experience of this and has come out the other side?