✔ 最佳答案
It depends on how you see the future of your relationship & your own perference.
Some people think 1-2 years is good enough to decide whether they get married or not, but others will perfer longer time to decide.
For determining whether your bf/gf is your best future husband/wife, I would see whether I can accept his/her personality and character fully or not. He/she also needs to make me feeling secure in the relationship.
Trust is another important issue since all relationship builds upon trust.