it's as simple as this...people change and evolve and unless the person you are with evolves WITH you, things are simply not gonna work out. This is not just in boyfriend/girlfriend realationship but in every relationship.
For example, when you sign a contract with a record company,
both parties (you and them) make an agreement and establish the rules on paper. At the time being things seam fair to you because of the reality at that particular time in your life. A couple of shows and recordings later, your reality has changed, the original rules can no longer apply and be considered "fair" to you, and you are simply not willing to
be as flexible or to take all the sh*t you took in the begining. In other words all matters have to be revaluated...and new agreements need to be made.
That's exactly how it works in frienship/relationships of any type. In order for them to be succesful, there must be flexibility and both paties must evolve WITH eachother.

-Siren


ps; marriage is an absurd.