Anyone else in a similar situation

Hiya.We have been married for 40 years and my husband has melanoma that has spread.I am 62 and my husband is 67.We have good days and bad days.We know that the melanoma can't be cured just controlled.Was wondering if there is anyone out there going through similar as it can sometimes feel very lonely. Family and friends are very good but I don't think anyone can understand how hard it can be unless they are  going through it for themselves.