This doesn’t help you, OP, but your story has prompted me to re-post the following:
When I was about 18, my father shared with me the following pearl of wisdom: 'Never trust what a man tells you about his sex life'. Not exactly what you want to hear from your dad. But actually every time I have had the opportunity to test that piece of advice directly or on behalf of friends (and there have been dozens of such occasions), that advice has proven to be accurate.
I don't know what impulse causes men to lie about their sex life - I think it may stem from some kind of default assumption that men are 'naughtier' when it comes to sex than women (which is of course not true) and that the woman will be disapproving of and/or jealous about the man's history and will therefore decline to sleep with him. It's probably more relevant in your teens and twenties when people have varying degrees of history. In my and my friends' experience, it's generally been quite innocuous (for example, one boyfriend told me he had only had 1 partner before me when in fact it transpired he'd had 3; i'd had 5 and we were using condoms), so I'm not suggesting that these men have deeply sinister sexual secrets to hide. However, it did mean that I have always insisted on condoms (coming of age in the mid-80s probably also had something to do with that, of course) and would walk away from a sexual encounter rather than compromise on using a condom. My DH was the first man I had condomless sex with - and that was only after we had settled down into our long-term committed relationship.
No doubt there are exceptions to that rule and it becomes less relevant once you hit 30s, 40s and older because people are presumed to have a fair degree of sexual history by then and don’t necessarily discuss it in the same way. But it's proved a useful thing to bear in mind.
As for what’s happening now - I hope you’re able to clear up your discharge etc as soon as possible and be completely comfortable again. However the failure to say anything to you is problematic: for your own health you surely are entitled to know if his genital warts have flared up again. Good luck sorting this out OP.