There is nothing wrong in writing about your feelings. I do find writing therapeutic. I actually commend you for knowing the difference between what your "want" and what you "need" in a man.

However, you can have your sexual spark in your relationship if you can introduce some fantasy sex to your man. If he is as self-secured as you've described him, I'm almost certain he won't mind working on his sex mojos.

But don't sound obsessed about the idea or too demanding of how sexy he should be, so he doesn't mistake your intentions which can bruise his ego.

If his lack of sexual mojo isn't a result of past trauma then it could be he hasn't tapped into that side of him, yet. This subject is a delicate matter, so approach it with caution.