Last night I cried myself to sleep.
I don’t want to get married, and I know that is where you are headed. But I know if I say no, our relationship will probably deteriorate and I won’t see you after that. I can’t marry you, and I can’t stand the thought of losing you. I don’t even know how to begin to explain this to you, because I love you so much and have never given you any inkling of sadness in this treasured little relationship.
Sorry in advance for the hurt I’ll bring to both of us.