You said you love your wife and your friends have the same problem.
Who said you wont have the SAME problem with another wife!! Or that you will love her as you love your current wife. If you feel your situation is bad, a divorce is so very much worse and it doesn’t ever end if children are invovled. Its like going from the frying pan into the fire unless if the spouse is abusive which does not seen to be your case.
Maybe HaShem is telling you and your friends to spend more time learning Torah outside your house. Also I suggest that besides giving your children prime time give the same to your wife. Take her out every Rosh Hodash alone just you and her.
Sometimes nagging is another way of saying TALK TO ME or GIVE ME ATTENTION or ACKNOWLEDGE ME or RESPECT ME!!!!
I suggest that you read “The Garden of Peace” (the men’s edition )by Rav Shalom Arush. There is also a Women;s edition.
These books have saved many marriages and prevented broken homes.