My boyfriend was just told his moles were melanoma

hi. New here. My boyfriend just had 3 moles removed that they said are cancer. They did I biopsy of his lymphnode in his armpit near the moles. They said it was swollen. We haven't heard back yet. He has had 2 family members who had this and died very quickly. Werw scared but don't know much about this at all. What thw chances are it's in the lymphnode already? Or more then one? Survival rates? He's only in his early 30s. Any advice?