Nothing is wrong with no knowing. Almost nothing works out to plan anyways.
I married at age 18 and have had a long and happy marriage.
I have never hada a girlfriend (nor boyfriend! lol) and it is highly probabe i and up dying alone (and no, I am not being pessimistic). I have nothing against one's religion, gender, skin color, belifs, etc. The only "requirement" I have to my future beloved one is: they must have content.