Love is such a finicky word, it's such a finicky concept.  Being married for 25 years is a long time (I'm only 22), but the question I want to ask you is... In those 25 years, did you have more happy memories or more bad memories?  If the answer is more happy memories, then I suggest couples/relationship enhancement counselling.  However, if it's more bad memories, then perhaps you should seek a lawyer and consider a seperation.  
Someone said that the best thing for kids is a HAPPY parent, and I agree.  As the old adage goes, "If you're not happy, do something about it." 
And hey, if that doesn't work, bake cookies. I find that always helps 
