I have written a letter to you, I feel relieved because I feel guilty that the lack of contact with you for a long time. The mail has a very long text may make you waste time reading so sorry.
I wrote to you I feel relieved because I feel guilty that you lost contact with for a long time. Mail message is very long You may spend time reading. so sorry
I wrote a letter to you. I feel relieved because I feel that lose contact with you for a long time, what was the message is too long. Might make you waste time reading, I apologize.