Going on a break is a BAD idea given the situation you are in. He may not see it as an opportunity to wet his beak else were but at mid point of the break he will contemplate. I think you are just afraid and possibly very shy to let out your sexual nature. Darling we are humans, WE HAVE TO, NEED TO have sex for several reasons.
My advice is sit down with him, show him you really appreciate the fact that hes stuck around for so long and that his loyalty and longevity increases your desire for him and that you really do want to make love to him but fear holds you back. If you drop it to him like that, he will know how to approach you when the act does happen. Us men have various levels of sexual attack. Aggressive, Soft, or Just UnGodly etc.
Hes a good man, but that doesn't mean you have to allow him to release his militants just to keep him. Tough position you are in.
Once is happenstance. Twice is coincidence. Three times, it's enemy action