Dear Nadia , Everything happens by fate. its gonna be your fate that you will find the right person or it will be your fate that you will say yes to some proposal. it is your fate that you haven't found anybody yet. and by fate i surely meant Allah's Will. so just praise the lord and go with the flow . he must have something planned for you as well.
Surah Al- insan ayat 30:
وَمَا تَشَاءُونَ إِلَّا أَن يَشَاءَ اللَّهُ ۚ إِنَّ اللَّهَ كَانَ عَلِيمًا حَكِيمًا And you do not will except that Allah wills. Indeed, Allah is ever Knowing and Wise.