After the sudden death of my husband, people suggest that I should remarry to cope with life's challenges. However, I believe that the hardships are a test of my patience so that I may deserve eternal companionship with him in the afterlife. Am I right?
I am sorry to hear about your loss.
It is your decision whether or not to remarry. Now that your husband has passed on, I am sure he would want you to be happy and more secure for the rest of your life.
However, possibly you are still going through the mourning process and aren't ready; maybe if you meet the right person and it is the right time, you will feel inside that it is the right time. Maybe the way you are seeing things right now suggests that it isn't quite the right time.
Religiously speaking, there is no benefit to putting extra restrictions on ourselves or making ourselves suffer more than our circumstances require. Sometimes people do this with a sense that Allah rewards difficulty. However, life is difficult enough without putting extra restrictions on ourselves!
People in jannah can be with whoever they want, whether or not they remarry.
With duas