I love you in Seminole is "Cheh moka is cheh".
The Seminole Indians speak two different languages, Creek and Miccosukee. These languages are related to each other (they both belong to the Muskogean language family), but speakers of one language cannot understand the other unless they have studied it, like speakers of English and German (which are also related to each other.)
Muskogee, or Creek, is a Muskogean language of the American Southeast, related to other Southeastern languages like Choctaw, Chickasaw, and Koasati. The language has been in decline, but some young people are working to keep their ancestral language alive. Like other Muskogean languages, Muskogee Creek is a language with morphologically complex verbs and SOV word order.
Miccosukee is a Muskogean language of the American Southeast. It is still spoken today by about 500 Seminole people in Florida, one of two languages spoken by the Seminoles (the other is Creek). Miccosukee is very closely related to another Muskogean language, Hitchiti, and some linguists consider them dialects of a single Hitchiti-Mikasuki language. Like other Muskogean languages, Mikasuki is a language with morphologically complex verbs and SOV word order.
Learn more about Creek language, alphabet and pronunciation at Omniglot.