A person cannot solve a problem by ignoring it. Nothing gets fixed by repressing feelings, or by internalizing emotion, or by worrying but not communicating that worry.

I have to say that, barring a medical reason, the best course of action is NOT to ignore what's happening to you. Find out WHY this is happening to you and find out what you need to do to fix it. Even if it means talking to a professional, I'd say go for it.

But first, I would see a doctor. If your sex drive stopped suddenly after an illness, then your body chemistry may be out of whack and some simple medications might help. On the other hand, maybe it's not physical at all and you have an issue that needs to be worked through in your subconscious. Well, your subconscious isn't going to deal with whatever the issue is if you just tell your brain to not think about what the problem could be and how to do anything about it.

See a doctor. And then, if no medical reason is present, talk to someone. Start with your partner, your friends here, email someone you know and trust privately (me if you want to), or see a professional. But don't ignore it and expect it to go away. It won't.