Yeah, 15 years is a long time............It's hard not to get into the dull boring routine of life. Well you suggest that you might perhaps stray?!

Why not try this? Alot of times we start to take each other for granted whether we realize it or not........So..........Treat her like she's the "other woman" ....Ie brand new in your life............Now you got to impress this new woman, what do guys do?
Dress to the nines, cologne, sexy undies(throw out the tighty whities), listen with great interest in everything she says, dates, dates must have dates, call just to say "i love you" or "i miss you so much", bring small gifts.........Throw in little mind benders...............

............Just so happens that my beau get ho*ny as he** whenever there's a full moon........Always think about him when I see one............While driving home from work last night, look up and lo and behold....What's up in the sky.......A huge bright full moon.............Almost drove off the road.

If all else fails there's always counselling........Don't wait for it to get worse.....Needs work now. :)