Originally Posted by
Jake2008
Five years was a long investment in a relationship.
Yes, people can, and do change. The year that the two of you have been apart could have been a year that she has matured and she could be totally different than the person she was a year ago.
I would be more inclined if you are feeling stuck about what to do, is try to honestly go back to the time during the relationship, particularly toward the end of the five years. Were things rocky then? Were you getting along well, making plans for the future? Was she faithful for the five years? Were you?
If there were no problems while you were together for the most part, until she developed the relationship with her lecturer, and you have no answer for why that happened, then there is something missing. That she gets 'crushes' may not mean anything if she doesn't act on them either.
People fall out of love all the time, and when that happens, so do affairs for a million different reasons. Maybe she was just ready to move on, and if it hadn't been her teacher, it would have been someone else.
But, yes, people do change. Sometimes when one realizes that the grass is not greener on the other side, they've learned a big enough life lesson to realize what they lost by taking a chance in another pasture.
I would proceed with caution, but, I would proceed.