Hey guys...help me out please...suggest me something...?

Hey men..My husband is being quite these days..since 5days he not as he used to be..I asked me many times the reason but he says he himself doesnt knw the reason..he jst feel like he want to be quite...hez 30yrs....he says he might be quite because hez gettting matured...do u think it can be the reason...hez a jolly person..m worried I want my husband back...What do you think I should do to make him happy...