彼(かれ)の言葉(ことば)はお世辞(せじ)ではなく、本当(ほんとう)の気持(きも)ちです。

His words are not flattery; they are his true feelings.

そんなに褒(ほ)めても、お世辞(せじ)にしか聞(き)こえません。

Even if you praise me that much, it just sounds like flattery.

お世辞(せじ)を言(い)うのは苦手(にがて)です。

I am not good at giving compliments.