翻訳 - ブラジルのポルトガル語-ラテン語 - Eu sou um menino apaixonado.

Inamoratus – is a term which is not frequently encountered in Classic Latin, in my knowledge, but you can use it and also “puer amans sum”. I didn’t have the English version of the text but I assumed that “apaixonado” means “in love”