Hi!
There are many ways to say it depending on the usage or construction of the sentence.
"Formal"
1. Hindi na kita gusto. ( I don't like you anymore.)
2. Hindi na kita mahal. ( I don't love you anymore.)
"Informal"
1. Ayaw ko na sayo. or Di na kita gusto. ( I don't like you anymore.)
2. Di na kita mahal. ( I don't love you anymore.)
Hope it helps =)