Don't marry people that are not meant for you. Before we were born our CREATOR already destined us to be with certain people as husbands and wives, but people try to marry (or marry) someone else or at the wrong time. Always wait for the right person and the right time.
Our CREATOR's Will rather than human will should always prevail.
At the right time a compatible partner would be found.
Do you really believe there are partners arranged for everyone? If yes, do you have a girlfriend and you think she's the right one?
Because one reason many people get old or later make marital mistakes is this waiting for the right one decision. So how do you know that you've finally met the right partner destined for you?
I have had family members who have grown up and died without getting married, so it could be interpreted as a fact there are people who are meant to be alone and never marry. Some may say it is because God had a different mission for them or whatever, anyways, dying alone is one of the saddest things which could happen to anyone, but there are people who do not mind being alone... To each their own, I guess.