Plutarch lists Admetus as one of Apollo's lovers and says that Apollo served Admetus because he doted upon him.
plˈuːɾɑːɹk lˈɪsts ɐdmˈɛɾəs æz wˈʌn ʌv ɐpˈɑːloʊz lˈʌvɚz ænd sˈɛz ðæt ɐpˈɑːloʊ sˈɜːvd ɐdmˈɛɾəs bɪkˈʌz hiː dˈoʊɾᵻd əpˌɑːn hˌɪm.