「もちろんあなたも私に対して不満はあると思う。もしあるなら、私に話してほしい。これからは、お互いのいいところも、イヤなところも言い合って（伝えあって？）いけるといいな。」
ofcause you have some discontents about me, if you have, i want you to tell me what in me displeases you. までは文作れたのですが（変だったら直してください・・・）、その後がよくわかりません。誰か英語になおしてください！お願いしますｍ＿ｍ

I would say like this below. It might be too simple, but my English is always simple. I hope it helps you.
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There might be something that you are not happy about (or with) me. And if there’s any, I want you tell me those and I am hoping that we can say all our things to each other, things we like and even things we don’t like.
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Janet said, ”You know, we are different. I wouldn’t be suprised if you have something about me that you just don’t like. But if you do, please do tell me, so that we can know about us and understand each other much more, from now on.”
Then she leaned forward and pecked on Sam’s cheek.


　

thank you!