A little sad

Me and my boyfriend have been ttc for awhile and last week I found out I was pregnant and ever since then I feel like he's not happy and it gets me very sad. He told me he is he just feels a lot of pressure another mouth to feed:( but i don't think it's that I feel he's not happy. And everytime anyone asks him if he's happy he says yes but I feel like it's fake. Idk if it's just the hormones I feel sad or idk I know he'll come around but if we have been trying why isn't he as happy as me:(