Marriage or Live in relationship? Which one and why?

i don't agree on "live in relationships". I believe that marriage is made not just for fidelity but a sacrament given to us by God.

It depends to a couple, me and my partner right now..were living in for about 3 years we have a plan to get married but we have enough money yet, that is our reason but it is okey for me as long as we love each other.

I like to marry because after marriage there is small family and for us there will be somebody and childern and wat is there in general realtionship if we got any disturbance then we easily broke our relations but after marriage the relatio is strong if there is any missunderstanding b/w us then we can think for us and for our childern and we can join.