a fair-weather friend

someone who is only your friend when you are happy and successful I had a lot of money and I knew a lot of people, but most of them turned out to be fair-weather friends.

Common Names:

Name	Pronounced	Usage
ZÉPhyrine	-	French (Rare)
Sigvard	-	Swedish
Dominique	do-mee-NEEK	French
Eutychios	-	Ancient Greek
ÁSlaug	-	Ancient Scandinavian, Icelandic
Eloise	EL-o-eez, el-o-EEZ	English