Sincere thanks for all the time you spent with me.
这样说就可以了, 地道
Even the air smells sweety, when there's me and you.
sincerely appreciate you be with me(感觉是朋友还好,长辈就不太恰当了)
Thank you so much for your distinguished company these days.
直译版:I sincerely thank you for all your time with me.
感情版:Your keeping me company has deeply touched my soul.
相思版:Your time with me is what I miss all the time.
隐私版:Our intimacy is the very moving romance we share.
Your time for me, my heart for you.