Is everything just chance or were some things meant to be?

Then let's say...God puts 2 people on earth and they are lucky enough to find one another but one of them gets hit by lightening, well then what? Is that it? Or perchance you meet someone new and marry all over again is that the lady you're supposed to be with or was it the 1st? And if so, when the 2 of them were walking side by side, were they both the one for you and you just happen to be the 1st one 1st or was the 2nd one supposed to be 1st? And is everything just chance or were some things meant to be?