If my wife departs and then divorces me even after having been married in the church does she then become an unbeliever? If she can do this then could a true marriage have ever existed? I think not.
How does the wife leaving you make her an unbeliever? The two do not go hand in hand. If she leaves you or divorces you then you must realize that the marriage did exist. If you are to receive an annulment, the Magesterium is stating that the sacrament was not valid. That is for them to decide.
Can you show me where the church teaches this fall would be Mortal sin and not venial. After all if I am a passionate person and don’t mean to sin but can’t fight the flesh very well then am I condemned because I am weak.
The Catechism states:
2353
Fornication is carnal union between an unmarried man and an unmarried woman. It is gravely contrary to the dignity of persons and of human sexuality which is naturally ordered to the good of spouses and the generation and education of children. Moreover, it is a grave scandal when there is corruption of the young.
It also states in the Bible that no fornicator (excuse me that I do not have the direct verse in front of me) will enter into heaven.
If you cannot “fight the flesh” then you need to pray to St. Joseph for the strength to do so. It is not up to us to deciee whether this is right or not, God did not ask us our opinion. He stated that it was wrong and the Church has echoed that in her teachings.
Or am I immature and not ready for marriage at all?
This is a question that you must explore for yourself. You stated that you have been married and divorced/annuled twice already. There may be a reoccuring theme here. I am not saying that you are or are not mature enough for marriage. I think that you may want to reevaluate your view on marriage, especially seeing as how you seem to think that sex before marriage is okay as is living together.
Why is just living together sin? I disagree. If there are technicalities of time and impediments of distance then whats the fault of co-habitation if the intent to commit is there and one can remain chaste until the technicalities can be overcome.
How else is one to get established in a new area. We are living in a nuclear society and its possible to get to know someone online and on the phone that you want to spend more time with. Is it then wrong to go there and spend time with them if you cannot afford a motel room for several weeks?
Living together is a near occasion of sin. I know that you may disagree, but again God did not ask you and He did not ask me. We are not allowed to make up the rules as we go along. We are not allowed to change what has been taught just to meet our current situation.
We all have to make sacrifices in this life. Living the life of a Catholic is not “easy” based upon what the view of society is in this day and age. But again, that is one of the strongest things about the Catholic church…she does not change, she is consistent, she is unfailing, she stands strong.
I am sorry that we do not see eye to eye on these issues, but Catholicism is not the religion that we can pick and choose what we like based upon our lifestyle.