And I heard a lot of stories where two people love each other since school, would be going on and off often for reasons (like hard times, problems, but nothing like lies or cheating), and at the end stay together, get married and be happy... What are the chances for a long turm on/off relationship for reasons of communicational breakdown, a lot of all kind of problems at once, not being able to handle to care of someone (give them enough of care and attention because of life very rough patch), but two people love each other very much, to some day turn into happy "on" relationship (may be when people are more mature and ready)?
So many true life-stories heard...
Can there be a happy end?

No communications make healthy relationships very hard, but sometimes, people work together to solve their problems, to the benefit of both partners, and can be happy, in the long term. So I guess if they are willing to work together, they have a chance. In life there ar no guarantees'.