If you mean "дуже", it modifies the verb, so the most natural position for it is before the verb. However, it is possible to put it anywhere in this sentence. You can say "Я люблю дуже моє місто" or even "Я люблю моє місто дуже", but this is more unusual. Most often sentences with such unusual word order can be found in poetry. If you use such word order in everyday conversation, you will be understood, but it will sound strange.