Please trust my faithful heart.
(请你相信我赤诚的真心 我认为这样翻更能体现“真心”二字)
楼主,或许这样更表深情:
Do have confidence in my permanernt love~
believe my heart,OK?
Please have faith in me.
或者
Please believe my sincerity.
我觉得我的这两个不是很表面啊~~~
我没有把心翻译出来而是用sincerity真诚,真挚代替了~
再写一个
Please let my sincerity/heart warms you.
请让我的真诚/心来温暖你。
Please trust my real heart!
Please trust my true feeling。
Please have faith in my love for you.
Please have faith in my heart.
Please believe me.