Fair enough, unapproving parents is painful. I'd recommend instead of secrecy that they be aware of it and can kindly get fucked until they've adjusted their attitude. It'll be easier for you two.

If that's all it took for him to explore breaking up, do you think his commitment to the relationship matches yours and could be relied upon?

Well, talk about it. Talk about what's going on, how it makes you feel and that you want to work it out for the wellbeing of your relationship. Discuss with patience, respect and importantly, indoor voices.

Why do you want to preserve the relationship, in spite of the hurtful behaviour?