A marriage where the people involved no longer want the same things is not worth "saving".
It creates an atmosphere where one person is trying to control/persuade the other person to change.
One of the pluses that should distinguish your spouse from other people you've dated is they "get you". They love and adore you for who you are. They "natually" want to go in the same direction as you. Opposites may attract for the short-term but like attracts like for the long-term.
When you put a reckless spender with a saver both people are likely to be frustrated, put a romantic with someone who values being practical more than anything else and you will see frustration. Put a couple together who are sexually incompatible and one or both people will be unhappy.
The number one criteria for a successful marriage is having both people wanting the same things from their union.
If one of you has to become a "different person" in order to stay together (assuming there is no abuse or additction problems) then it means you are with "the wrong person".
It doesn't mean there is anything wrong with them or you per se.
It just means you are wrong for each other!
Thankfully there are close to 7 Billion people on the planet.
Odds are high there is someone who will love you as you are.
Life is too short to be wasting time trying to change water into wine or fit square pegs into round holes.
Know yourself first of all and then take your time getting to know your mate before exchanging vows.