My mom and dad were sealed together for 14 years before he died in a car accident. She remarried and they have been married together now for twice that long, but for lifetime only. 

Some people could argue that it isn't fair for her to not be sealed to the man that she has lived and loved for far longer. Yet, if you ask her about it, she's very happy to know that God is at the helm and her testimony is that she will be well taken care of in the eternities.

They are currently serving their second mission together and loving life. The sealing is not a today problem and you can have faith that God loves you and will take care of you too.